A certain machine annually loses 40% of the value it had at the beginning of that year. If its initial value is $15,000, find its value at the following times.
(a) The end of the seventh year
(b) The end of the ninth year

Answers

Answer 1

(a) At the end of the seventh year, the value of the machine is approximately $419.9.

(b) At the end of the ninth year, the value of the machine is approximately $151.16.

To find the value of the machine at the end of the seventh and ninth years, we need to consider the annual depreciation rate and the initial value of the machine.

- Initial value of the machine: $15,000

- Annual depreciation rate: 40% (or 0.40)

Let's calculate the value of the machine at the end of the seventh and ninth years:

(a) Value at the end of the seventh year:

To find the value at the end of the seventh year, we need to calculate the value after each year of depreciation.

Year 1: Value = Initial Value - (Depreciation Rate * Initial Value)

      = $15,000 - (0.40 * $15,000)

      = $15,000 - $6,000

      = $9,000

Year 2: Value = Year 1 Value - (Depreciation Rate * Year 1 Value)

      = $9,000 - (0.40 * $9,000)

      = $9,000 - $3,600

      = $5,400

Year 3: Value = Year 2 Value - (Depreciation Rate * Year 2 Value)

      = $5,400 - (0.40 * $5,400)

      = $5,400 - $2,160

      = $3,240

Year 4: Value = Year 3 Value - (Depreciation Rate * Year 3 Value)

      = $3,240 - (0.40 * $3,240)

      = $3,240 - $1,296

      = $1,944

Year 5: Value = Year 4 Value - (Depreciation Rate * Year 4 Value)

      = $1,944 - (0.40 * $1,944)

      = $1,944 - $777.60

      = $1,166.40

Year 6: Value = Year 5 Value - (Depreciation Rate * Year 5 Value)

      = $1,166.40 - (0.40 * $1,166.40)

      = $1,166.40 - $466.56

      = $699.84

Year 7: Value = Year 6 Value - (Depreciation Rate * Year 6 Value)

      = $699.84 - (0.40 * $699.84)

      = $699.84 - $279.94

      = $419.90

Therefore, at the end of the seventh year, the value of the machine is approximately $419.90.

(b) Value at the end of the ninth year:

To find the value at the end of the ninth year, we can continue the depreciation calculation for two more years.

Year 8: Value = Year 7 Value - (Depreciation Rate * Year 7 Value)

      = $419.90 - (0.40 * $419.90)

      = $419.90 - $167.96

      = $251.94

Year 9: Value = Year 8 Value - (Depreciation Rate * Year 8 Value)

      = $251.94 - (0.40 * $251.94)

      = $251.94 - $100.78

      = $151.16

Therefore, at the end of the ninth year, the value of the machine is approximately $151.16.

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Related Questions

1. Two Points A (-2, -1) and B (8, 5) are given. If C is a point on the y-axis such that AC=BC, then the coordinates of C is: A. (3,2) B. (0, 2) C. (0,7) D. (4,2)

Answers

The coordinates of point C, where AC=BC, are (0, 7).

To find the coordinates of point C, we need to consider that AC is equal to BC. Point A has coordinates (-2, -1), and point B has coordinates (8, 5). We can start by calculating the distance between A and B using the distance formula:

Distance AB = sqrt((x2 - x1)^2 + (y2 - y1)^2)

Plugging in the values, we get:

Distance AB = sqrt((8 - (-2))^2 + (5 - (-1))^2) = sqrt(10^2 + 6^2) = sqrt(100 + 36) = sqrt(136)

Since AC = BC, the distance from point A to point C is the same as the distance from point B to point C. Let's assume the coordinates of point C are (0, y) since it lies on the y-axis. Using the distance formula, we can calculate the distance AC and BC:

Distance AC = sqrt((-2 - 0)^2 + (-1 - y)^2) = sqrt(4 + (1 + y)^2) = sqrt(4 + (1 + y)^2)

Distance BC = sqrt((8 - 0)^2 + (5 - y)^2) = sqrt(64 + (5 - y)^2) = sqrt(64 + (5 - y)^2)

Setting the two distances equal to each other and simplifying, we have:

sqrt(4 + (1 + y)^2) = sqrt(64 + (5 - y)^2)

Squaring both sides and solving for y, we get y = 7. Thus, the coordinates of point C are (0, 7).

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When we use the term ideal fluid, we neglect: O density O pressure O energy conservation O friction and we assume laminar flow

Answers

When using the term ideal fluid, the assumption of neglecting friction is made. Frictional forces are not considered in ideal fluid analysis, while other factors such as density, pressure, energy conservation, and laminar flow are still accounted for.

An ideal fluid is a theoretical concept used in fluid mechanics to simplify the analysis of fluid flow. When considering an ideal fluid, certain assumptions are made to simplify the equations and calculations involved. These assumptions include neglecting friction.

Friction is the resistance encountered by a fluid when it flows over a surface or through a pipe. In real-world scenarios, frictional forces play a significant role in fluid flow, causing energy losses and affecting the behavior of the fluid. However, when dealing with ideal fluids, friction is ignored to simplify the analysis.

Other options listed in the question:

- Density: In ideal fluid analysis, density is not neglected. The density of the fluid is still considered and can affect the calculations.

- Pressure: In ideal fluid analysis, pressure is also considered and plays a role in determining the fluid behavior.

- Energy conservation: Energy conservation is still a fundamental principle in fluid mechanics, even when dealing with ideal fluids. It is not neglected.

- Laminar flow: The assumption of laminar flow is often made when analyzing ideal fluids. Laminar flow refers to smooth, orderly flow without turbulence. It is one of the simplifying assumptions used in ideal fluid analysis.

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10 Convert the following units from Sl to Imperial: a) 34cm to inches b) 22 litres to gallons c) 70 kilometres to miles d) 78 kilograms to pounds e) 144 square metres to square yards f) 56 metres to feet and yards Convert the following units from Imperial to Sl: 17 | Page a) 16 ounces to grams b) 34 yards to meters c) 6.5 gallons to liters d) 487 feet to meters e) 19 acres to hectares f) 56 tons to kilograms g) 45 inches to centimeters h) 321 cubic inches to cubic meters i) 1092 miles to kilometers j) 12 pounds to kilograms 1 2 1 Dot 3 Dots 6 Dots 10 Dots 15 Dots 2. Write down the sequence of the numbers of dots. Work out the next three terms and explain in words how you got the answer. A 44mm B 60mm D 44mm 80mm 15 Draw the following two-dimensional shapes and transform them to three dimensional shapes by adding a height or 10 depth of 3cm a) Square with dimensions 250mm. b) Rectangle with dimensions 300mm by 200mm. c) Right-angled triangle with an adjacent side of 3cm and an opposite side of 2cm. d) Circle with a diameter of 400mm. e) Semi-circle with a radius of 1cm.

Answers

a) 34 cm = 13.39 inches

b) 22 liters = 4.84 gallons

c) 70 kilometers = 43.5 miles

d) 78 kilograms = 171.96 pounds

e) 144 square meters = 172.8 square yards

f) 56 meters = 183.73 feet and 61.02 yards

To convert centimeters to inches, we use the conversion factor of 1 inch = 2.54 cm. Thus, 34 cm divided by 2.54 gives us 13.39 inches.

To convert liters to gallons, we use the conversion factor of 1 gallon = 3.78541 liters. So, dividing 22 liters by 3.78541 gives us approximately 4.84 gallons.

To convert kilometers to miles, we use the conversion factor of 1 mile = 1.60934 kilometers. Therefore, dividing 70 kilometers by 1.60934 gives us approximately 43.5 miles.

To convert kilograms to pounds, we use the conversion factor of 1 kilogram = 2.20462 pounds. So, multiplying 78 kilograms by 2.20462 gives us approximately 171.96 pounds.

To convert square meters to square yards, we use the conversion factor of 1 square yard = 0.836127 square meters. Thus, dividing 144 square meters by 0.836127 gives us approximately 172.8 square yards.

To convert meters to feet and yards, we use the conversion factor of 1 meter = 3.28084 feet. Therefore, multiplying 56 meters by 3.28084 gives us approximately 183.73 feet. To convert feet to yards, we divide by 3, so 183.73 feet divided by 3 gives us approximately 61.02 yards.

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in some cases the metal ceramic (PFM) can cause various
problem like
A.Gum staining
B.all answer are correct
C.release of metallic ions into the gingival tissue
D.allergies

Answers

Metal ceramic (PFM) restorations can cause various problems including gum staining, release of metallic ions into the gingival tissue, and allergies in some cases.

Gum Staining: The metal portion of the restoration may become exposed over time due to wear, chipping, or gum recession. This exposure can cause visible gum staining, leading to aesthetic concerns.

Release of Metallic Ions: Metal components in PFM restorations, such as alloys containing base metals like nickel, chromium, or cobalt, can gradually release metallic ions into the surrounding oral tissues. This process, known as metal ion leaching, occurs due to corrosion or interaction with saliva and oral fluids. The release of these ions may cause localized tissue reactions or sensitivity in some individuals.

Allergies: Some individuals may develop allergic reactions or hypersensitivity to the metals used in PFM restorations. Allergies can manifest as oral discomfort, inflammation, or allergic contact dermatitis in the surrounding tissues.

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A 25.00 mL sample containing BaCl2 was diluted to 500 mL. Aliquots of 50.00 mL of this solution were analyzed using Mohr and Volhard methods. The following data were obtained:
Volhard method:
Volume of AgNO3 = 50.00 mL
Volume of KSCN = 17.25 mL
Mohr method:
Volume of AgNO3 (sample titration) = 26.90 mL
Volume of AgNO3 (blank titration) = 0.20 mL
Calculate % BaCl2 using Mohr method and using Volhard method.

Answers

The percentage of Ba[tex]Cl_2[/tex] in the original 25.00 mL sample is approximately 0.1068% using the Mohr method and 0.1310% using the Volhard method.

We have,

To calculate the percentage of Ba[tex]Cl_2[/tex] using the Mohr and Volhard methods, we need to determine the amount of Ba[tex]Cl_2[/tex] present in the aliquots analyzed and then calculate the percentage based on the original 25.00 mL sample.

First, let's calculate the amount of Ba[tex]Cl_2[/tex] reacted in each method:

Mohr method:

Volume of AgN[tex]O_3[/tex] used in the sample titration = 26.90 mL

Volume of AgN[tex]O_3[/tex] used in the blank titration = 0.20 mL

The difference between these two volumes represents the volume of Ag[tex]NO_3[/tex] that reacted with Ba[tex]Cl_2[/tex] in the sample titration:

Volume of AgN[tex]O_3[/tex] reacted = 26.90 mL - 0.20 mL = 26.70 mL

Volhard method:

Volume of AgN[tex]O_3[/tex] used = 50.00 mL

Volume of KSCN used = 17.25 mL

To determine the volume of AgN[tex]O_3[/tex] that reacted with BaC[tex]l_2[/tex] in the Volhard method, we need to subtract the volume of KSCN used from the volume of AgN[tex]O_3[/tex] used:

Volume of AgN[tex]O_3[/tex] reacted = 50.00 mL - 17.25 mL = 32.75 mL

Next, we can calculate the number of moles of BaC[tex]l_2[/tex] reacted in each method:

Molar mass of BaC[tex]l_2[/tex] = atomic mass of Ba + (2 * atomic mass of Cl)

= 137.33 g/mol + (2 * 35.45 g/mol) = 208.23 g/mol

Mohr method:

Number of moles of Ba[tex]Cl_2[/tex] = (Volume of AgN[tex]O_3[/tex] reacted / 1000) * Molarity of AgN[tex]O_3[/tex]

Assuming the molarity of AgN[tex]O_3[/tex] is 1.0 M, we can calculate:

Number of moles of BaC[tex]l_2[/tex] = (26.70 mL / 1000) * 1.0 M = 0.02670 mol

Volhard method:

Number of moles of BaC[tex]l_2[/tex] = (Volume of AgN[tex]0_3[/tex] reacted / 1000) * Molarity of AgN[tex]O_3[/tex]

Again assuming the molarity of AgN[tex]O_3[/tex] is 1.0 M:

Number of moles of BaC[tex]l_2[/tex] = (32.75 mL / 1000) * 1.0 M = 0.03275 mol

Finally, we can calculate the percentage of BaC[tex]l_2[/tex] in the original 25.00 mL sample for each method:

Mohr method:

% BaC[tex]l_2[/tex] = (Number of moles of BaC[tex]l_2[/tex] Volume of original sample) * 100

% BaC[tex]l_2[/tex] = (0.02670 mol / 25.00 mL) * 100 = 0.1068% (rounded to four decimal places)

Volhard method:

% BaC[tex]l_2[/tex] = (Number of moles of BaC[tex]l_2[/tex] / Volume of original sample) * 100

% BaC[tex]l_2[/tex] = (0.03275 mol / 25.00 mL) * 100 = 0.1310% (rounded to four decimal places)

Therefore,

The percentage of BaC[tex]l_2[/tex] in the original 25.00 mL sample is approximately 0.1068% using the Mohr method and 0.1310% using the Volhard method.

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Let F(x) = integral from 0 to x sin(3t^2) dt. Find the MacLaurin polynomial of degree 7 for F(x)

Answers

Answer:

[tex]\displaystyle \int^x_0\sin(3t^2)\,dt\approx x^3-\frac{27}{42}x^7[/tex]

Step-by-step explanation:

Recall the MacLaurin series for sin(x)

[tex]\displaystyle \sin(x)=x-\frac{x^3}{3!}+\frac{x^5}{5!}-...[/tex]

Substitute 3t²

[tex]\displaystyle \displaystyle \sin(3t^2)=3t^2-\frac{(3t^2)^3}{3!}+\frac{(3t^2)^5}{5!}-...=3t^2-\frac{3^3t^6}{3!}+\frac{3^5t^{10}}{5!}-...[/tex]

Use FTC Part 1 to find degree 7 for F(x)

[tex]\displaystyle \int^x_0\sin(3t^2)\,dt\approx\frac{3x^3}{3}-\frac{3^3x^7}{7\cdot3!}\\\\\int^x_0\sin(3t^2)\,dt\approx x^3-\frac{27}{42}x^7[/tex]

Hopefully you remember to integrate each term and see how you get the solution!

A company plans to construct a wastewater treatment plant to treat and dispose of its wastewater. Construction of a wastewater treatment plant is expected to cost $3 million and an operating cost of $

Answers

Constructing a wastewater treatment plant is expected to cost $3 million, with additional operating costs.

Constructing a wastewater treatment plant involves significant upfront costs, estimated at $3 million. This includes expenses related to site preparation, infrastructure development, construction of treatment units, installation of necessary equipment, and other associated costs.

The high cost is attributed to the complex nature of wastewater treatment facilities, which require specialized engineering and technology to ensure effective treatment and disposal of wastewater.

In addition to the construction cost, operating the wastewater treatment plant incurs ongoing expenses. These operating costs encompass various aspects such as energy consumption, maintenance and repairs, labor wages, chemicals for treatment processes, and administrative expenses.

The specific operating costs can vary depending on the size of the plant, the treatment technologies employed, the volume and characteristics of the wastewater being treated, and regulatory requirements.

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The total cost function for a product is C(x) = 875 In(x + 10) + 1600 where x is the number of units produced. (a) Find the total cost of producing 200 units. (Round your answer to the nearest cent.) (b) Producing how many units will give total costs of $8500? (Round your answer to the nearest whole number.) _____units

Answers

(a) The total cost of producing 200 units is approximately $6103.53.

(b) Producing approximately 2641 units will result in total costs of $8500.

(a) To find the total cost of producing 200 units, we can substitute x = 200 into the cost function C(x) = 875 ln(x + 10) + 1600 and evaluate it.

C(200) = 875 ln(200 + 10) + 1600

C(200) ≈ 875 ln(210) + 1600

C(200) ≈ 875 × 5.347 + 1600

C(200) ≈ 4503.525 + 1600

C(200) ≈ 6103.525

Therefore, the total cost of producing 200 units is approximately $6103.53.

(b) To find the number of units that will result in total costs of $8500, we can set the cost function equal to $8500 and solve for x.

875 ln(x + 10) + 1600 = 8500

875 ln(x + 10) = 8500 - 1600

875 ln(x + 10) = 6900

Next, we can divide both sides of the equation by 875 and take the exponential of both sides to eliminate the natural logarithm:

ln(x + 10) = 6900 / 875

ln(x + 10) ≈ 7.8857

Taking the exponential:

e^(ln(x + 10)) ≈ e^7.8857

x + 10 ≈ 2650.579

x ≈ 2640.579

Rounding to the nearest whole number, producing approximately 2641 units will result in total costs of $8500.

Therefore, producing approximately 2641 units will give total costs of $8500.

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Choose each correct coordinate for the vertices of A’B’C
Need asap

Answers

The correct coordinates for the vertices of triangle A' * B' * C' are:

A' * (-10, 20)

B' * (-20, -30)

C' * (20, -20)

To determine the vertices of triangle A' * B' * C', which is obtained from a transformation of triangle ABC, we need to apply the given transformation to each vertex of triangle ABC. The transformation involves scaling, translating, and rotating the original triangle.

Given:

Triangle ABC with vertices:

A(-4, 6)

B(-6, -4)

C(2, -2)

Transformation:

Dilatation: Scale factor of 5

Translation: Move 2 units to the right and 2 units down

Let's apply the transformation to each vertex:

1. Vertex A:

Applying the translation, A' = A + (2, -2) = (-4, 6) + (2, -2) = (-2, 4)

Applying the dilatation, A' = 5 * (-2, 4) = (-10, 20)

2. Vertex B:

Applying the translation, B' = B + (2, -2) = (-6, -4) + (2, -2) = (-4, -6)

Applying the dilatation, B' = 5 * (-4, -6) = (-20, -30)

3. Vertex C:

Applying the translation, C' = C + (2, -2) = (2, -2) + (2, -2) = (4, -4)

Applying the dilatation, C' = 5 * (4, -4) = (20, -20)

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a count went up from 450 to 600 what was the approximate percent increase

Answers

Answer:15%

Step-by-step explanation:

i used my brain

Answer: 15%
Explanation: Take 450\600 and you will get .75 that’s the difference, subtract that from 1 (100 percent in decimal form) and you get .15, .15 as a percent is 15%

A solution is prepared by dissolving 2.746 g of KBr into enough water to make 561 mL. What is the molarity of the solution? KBr:MW=119.002 g/mol  a) 4.11×10^−5 mol/L  b) 4.89×10^−1 mol/L  c) 4.11×10^−2mol/L

Answers

The molarity of the solution containing 2.746 g of KBr dissolved in enough water to make 561 mL is 4.11 x 10^-2 mol/L.Hence, option (c) is correct.

Molarity is defined as the amount of solute dissolved in 1 liter of the solution. It is denoted as M and measured in mol/L. Given data: Mass of KBr = 2.746 g

Volume of water = Enough to make 561 mL or 0.561 LK

Br: MW = 119.002 g/mol The molarity of the solution can be calculated using the formula:

M = \frac{n}{V}

where n = number of moles of KBr,

V = volume of the solution in liters.

Substitute the given data in the formula: Molarity, M = number of moles of KBr/Volume of the solution Molar mass of KBr (MW) = 119.002 g/mol Number of moles of KB

r = Mass of KBr/M

W= 2.746 g/119.002 g/mol

= 0.02306 mol

Volume of the solution = 0.561 L Substitute the above values in the formula:

Molarity, M = 0.02306 mol/0.561

L= 0.0411 mol/L

Therefore, the molarity of the solution is 4.11 x 10^-2 mol/L.

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A composite function. The inner and outer function must be the following equation accordingly. Logarithmic Functions: y=log1.5​(x) Exponential Function : y=2x Determine the Instantaneous Rate of Change at x=A Choose a value for A in the domain of your function and show full calculations. Is the function increasing at that point? How do you know?. No marks are given if your solution includes: e or In, differentiation, integration.

Answers

The given function is increasing at the point x = A = 2, and the instantaneous rate of change at the point is approximately 2.

For this question, we use the properties of increasing and decreasing functions, the instantaneous rate of change, and their equations.

Usually, to calculate the instantaneous rate of change of the function at a point, we use differentiation. But this time, we'll use a slightly different approach.

The composite function is given by:

f(x) = log₁.₅(x²)

We rewrite this function as follows.

f(x) = log₁.₅(x²) = log₁.₅(x * x) = log₁.₅(x) + log₁.₅(x)

Now, we determine the value of f(A), using A = 2 as our chosen value.

This turns out to be:

f(2) = log₁.₅(2) + log₁.₅(2)

log₁.₅(2) =  log(2)/ log(1.5)

              = 0.3010/0.176

              = 1.7095

So, f(2) = 1.7095 + 1.7095

            = 3.419

To determine whether the function is increasing at x = A, we can evaluate f(x) for a value slightly greater than A, such as x = 2.1.

So, for the function:

f(2.1) = log₁.₅(2.1) + log₁.₅(2.1)

log₁.₅(2.1) =  log(2.1)/ log(1.5)

               = 0.322/0.176

               = 1.829

f(2.1) = 1.829 + 1.829 = 3.658.

So, f(2.1) > f(2) for the function.

Thus, the function is increasing at the point A = 2.

Now, to calculate the instantaneous rate of change, we use the following equation.

Instantaneous rate of change = Lim(h -> 0) [(f(A + h) - f(A)) / h]

If we plug in A = 2,

f(A) = f(2) ≈ 3.419

Lim(h -> 0) [(f(A + h) - f(A)) / h] = lim(h -> 0) [(f(2 + h) - 3.419) / h]

As we know, 'h' needs to be small enough to be comparable to zero. We'll take h = 0.0001 for our needs.

[(f(2.0001) - 5.41902) / 0.0001] ≈ (3.4192 - 3.419) / 0.0001

Instantaneous rate of change ≈ (0.0002) / (0.0001)

                                                 ≈ 2

Therefore, the instantaneous rate of change at the point is 2.

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Using standard heats of formation, calculate the standard enthalpy change for the following reaction. NH4NO3(aq) N₂O(g) + 2H₂0 (1) ANSWER: kJ

Answers

Using standard heats of formation,the standard enthalpy change for the given reaction is -124.5 kJ/mol.

The standard enthalpy change for the reaction NH4NO3(aq) → N2O(g) + 2H2O(l) can be calculated using the standard heats of formation.

First, we need to identify the standard heats of formation for each compound involved in the reaction. The standard heat of formation (ΔHf°) is the enthalpy change that occurs when one mole of a compound is formed from its elements in their standard states at a given temperature and pressure.

The standard heats of formation for NH4NO3(aq), N2O(g), and H2O(l) are as follows:
- NH4NO3(aq): -365.5 kJ/mol
- N2O(g): 81.6 kJ/mol
- H2O(l): -285.8 kJ/mol

Next, we need to determine the stoichiometric coefficients of the compounds in the balanced equation. From the equation, we can see that 1 mole of NH4NO3(aq) produces 1 mole of N2O(g) and 2 moles of H2O(l).

Now, we can calculate the standard enthalpy change using the formula:
ΔH = Σ(nΔHf° products) - Σ(mΔHf° reactants)

Plugging in the values, we have:
ΔH = (1 mol × 81.6 kJ/mol) + (2 mol × -285.8 kJ/mol) - (1 mol × -365.5 kJ/mol)
   = 81.6 kJ/mol - 571.6 kJ/mol + 365.5 kJ/mol
   = -124.5 kJ/mol

Therefore, the standard enthalpy change for the given reaction is -124.5 kJ/mol.

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(Trig) Find the missing sides or angles from the right triangles

Answers

The measure of the missing side length of the right triangle is approximately 32.1.

What is the measure of the missing side length?

The figure in the image is a right triangle.

From the image:

Angle θ = 0.646 rad

Opposite to angle θ = 19.3

Hypotenuse =?

To solve for the missing side length, we use the trigonometric ratio.

Note that: sine = opposite / hypotensue

Plug the given values into the above formula and solve for the hypotenuse.

sin( θ ) = opposite / hypotenuse

sin( 0.646 rad  ) = 19.3 / hypotenuse

Hypotenuse = 19.3 / sin( 0.646 rad  )

Hypotenuse = 32.1

Therefore, the hypotenuse measures 32.1 units.

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Given the function f(x) = 5x^2 – 6x + 4, find and simplify the difference quotient ( f(x+h) - f(x) ) / h.

Answers

The simplified difference quotient is 10x + 5h – 6.

To find the difference quotient for the function f(x) = 5x^2 – 6x + 4, we need to evaluate the expression (f(x+h) - f(x)) / h.

Step 1: Substitute (x + h) into the function f(x) for f(x+h):

f(x + h) = 5(x + h)^2 – 6(x + h) + 4

Step 2: Simplify the expression for f(x + h):

f(x + h) = 5(x^2 + 2hx + h^2) – 6(x + h) + 4
        = 5x^2 + 10hx + 5h^2 – 6x – 6h + 4

Step 3: Substitute x into the function f(x):

f(x) = 5x^2 – 6x + 4

Step 4: Subtract f(x) from f(x + h):

f(x + h) - f(x) = (5x^2 + 10hx + 5h^2 – 6x – 6h + 4) - (5x^2 – 6x + 4)
               = 5x^2 + 10hx + 5h^2 – 6x – 6h + 4 - 5x^2 + 6x - 4
               = 10hx + 5h^2 – 6h

Step 5: Divide the difference by h:

(f(x + h) - f(x)) / h = (10hx + 5h^2 – 6h) / h
                     = 10x + 5h – 6

Therefore, the simplified difference quotient is 10x + 5h – 6.

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The cost of producing x smart phones is C(x)=x^2+600x+6000. (a) Use C(x) to find the average cost (in dollars) of producing 1,000 smart phones. s (b) Find the average value (in dollars) of the cost function C(x) ) over the interval from 0 to 1,000 . (Round your answer to two decimal places.) 5

Answers

(a) The average cost of producing 1,000 smart phones is $1,606.
(b) Rounded to two decimal places, the average value of the cost function C(x) over the interval from 0 to 1,000 is $435,333.33.

The cost function for producing x smart phones is given by C(x) = x^2 + 600x + 6000.

(a) To find the average cost of producing 1,000 smart phones, we need to divide the total cost by the number of smart phones produced.

Plugging in x = 1,000 into the cost function C(x), we get C(1,000) = 1,000^2 + 600(1,000) + 6,000.

Evaluating this expression, we find that C(1,000) = 1,000,000 + 600,000 + 6,000 = 1,606,000.

To find the average cost, we divide this total cost by the number of smart phones produced:

Average cost = Total cost / Number of smart phones

                       = 1,606,000 / 1,000

                       = $1,606.

Therefore, the average cost of producing 1,000 smart phones is $1,606.

(b) To find the average value of the cost function C(x) over the interval from 0 to 1,000, we need to find the average cost per smart phone produced in this interval.

We can use the formula for average value, which is the integral of the function divided by the length of the interval:

Average value = (1 / length of interval) * ∫(0 to 1,000) C(x) dx.

The length of the interval is 1,000 - 0 = 1,000.

Now, let's find the integral of C(x) from 0 to 1,000:

∫(0 to 1,000) C(x) dx = ∫(0 to 1,000) (x^2 + 600x + 6,000) dx.

Evaluating this integral, we get:

= [tex][(1/3)x^3 + 300x^2 + 6,000x][/tex] evaluated from 0 to 1,000.

= [tex][(1/3)(1,000)^3 + 300(1,000)^2 + 6,000(1,000)] - [(1/3)(0)^3 + 300(0)^2 + 6,000(0)].[/tex]

Simplifying further, we find:

= (1/3)(1,000,000,000 + 300,000,000 + 6,000,000) - 0.

= (1/3)(1,306,000,000)

= 435,333,333.33.

Now, we can find the average value of the cost function:

Average value = (1 / length of interval) * ∫(0 to 1,000) C(x) dx = (1 / 1,000) * 435,333,333.33.

= 435,333.33.

Rounded to two decimal places, the average value of the cost function C(x) over the interval from 0 to 1,000 is $435,333.33.

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An
account with 2.95% interest, compounded continuously, is also
available. What would the balance in this account be after 5 years
if the same $10,000 was invested?

Answers

Therefore, the balance in the account after 5 years will be 11,581.28

We have to determine the balance in the account after 5 years if the same $10,000 is invested at 2.95% interest, compounded continuously.

We know that the formula for continuously compounded interest is given by;

A = Pert

Where;

A = final amount

P = principal amount

e = 2.71828

r = annual interest rate

t = time in years

Therefore, the balance in the account after 5 years will be;

A = Pert

A = 10000 × e^(0.0295 × 5)

A = 10000 × e^0.1475

A = 10000 × 1.1581A

= 11,581.28

The balance in the account after 5 years if the same $10,000 was invested at 2.95% interest, compounded continuously is $11,581.28.

Therefore, the balance in the account after 5 years will be;

A = Pert

A = 10000 × e^(0.0295 × 5)

A = 10000 × e^0.1475

A = 10000 × 1.1581A

= 11,581.28

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Arrange the following sets of compounds in relative order of increasing boiling point temperature and explain how you determined the order. Be specific and clear with respect to which is lowest to highest in your sequence.
O2, NO, N2

Answers

The compounds can be arranged in order of increasing boiling point temperature as follows:
O2 < N2 < NO

To determine the relative order of increasing boiling point temperature for the compounds O2, NO, and N2, we need to consider their intermolecular forces. Boiling point is generally influenced by the strength of these forces.

1. O2: Oxygen (O2) is a diatomic molecule held together by a double covalent bond. It is a nonpolar molecule, and its boiling point is relatively low compared to other compounds. This is because oxygen molecules experience weak London dispersion forces between them. These forces arise from temporary fluctuations in electron distribution, resulting in temporary dipoles. As a result, oxygen has the lowest boiling point temperature in this sequence.

2. N2: Nitrogen (N2) is also a diatomic molecule held together by a triple covalent bond. Like oxygen, it is a nonpolar molecule and experiences London dispersion forces. However, nitrogen molecules are slightly larger and have more electrons, leading to stronger London dispersion forces compared to oxygen. As a result, nitrogen has a higher boiling point temperature compared to oxygen.

3. NO: Nitric oxide (NO) is a linear molecule with a polar covalent bond. It has a lone pair of electrons on the nitrogen atom, which leads to a dipole moment. This polarity allows for the formation of dipole-dipole interactions between NO molecules, in addition to London dispersion forces. Dipole-dipole interactions are stronger than London dispersion forces alone. Therefore, NO has the highest boiling point temperature among the three compounds.

To summarize, the compounds can be arranged in order of increasing boiling point temperature as follows:
O2 < N2 < NO

Please note that this order is based on the information provided about the compounds and their intermolecular forces. In reality, there may be other factors that can influence boiling point temperature, such as molecular size and shape, which are not considered in this specific question.

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The Hayflick limit is the limit telomeres can be shorten. Please explain and provide detail on how/why telomeres get shorten? Are telomeres able to be recreated? If so how and where would we find this?

Answers

Telomeres, which protect chromosome ends, shorten with each cell division due to the limitations of DNA replication, but can be partially replenished by telomerase in certain cell types, while their length and telomerase activity have implications for aging and disease.

The Hayflick limit refers to the maximum number of times a normal human cell can divide before reaching a state of replicative senescence or cell death. It was discovered by Leonard Hayflick in the 1960s and is associated with the shortening of telomeres.

Telomeres are repetitive DNA sequences located at the ends of chromosomes. Their primary function is to protect the genetic material of the chromosome from degradation and prevent the loss of essential genes during DNA replication. However, with each cell division, the telomeres progressively shorten.

Telomere shortening occurs due to the inherent limitations of DNA replication. The DNA replication machinery is unable to fully replicate the very ends of linear chromosomes, leading to the loss of a small portion of telomeric DNA with each round of cell division. This process is known as the "end replication problem."

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Explain alkali silicate reaction

Answers

The alkali silicate reaction, also known as the alkali-silica reaction (ASR), is a chemical reaction that occurs between alkalis (such as sodium or potassium) present in cement or concrete and reactive forms of silica (such as certain types of aggregates).

This reaction results in the formation of a gel-like substance, which can cause expansion, cracking, and deterioration of the concrete structure over time.

There are no specific calculations involved in the alkali silicate reaction. However, the severity of the reaction can be B by measuring the expansion of the concrete or observing the formation of cracks and other signs of deterioration.

The alkali silicate reaction is a significant concern in the construction industry as it can lead to the degradation of concrete structures. Preventive measures such as using low-alkali cement, incorporating supplementary cementitious materials, and selecting non-reactive aggregates can help mitigate the risk of ASR. Regular monitoring, testing, and maintenance of concrete structures are essential to detect and address any signs of alkali silicate reaction at an early stage. By understanding and managing this reaction, engineers and construction professionals can ensure the durability and longevity of concrete structures.

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pls answer asap pls i will upvote
A 6-m simply supported beam with an overhang of 1.5 m carries a uniform distributed load of 24 kN/m. Calculate the maximum positive moment (kN-m) within the beam.

Answers

The maximum positive moment within the beam is 18 kN-m within the span and 54 kN-m at the end of the overhang.

To calculate the maximum positive moment within the beam, we need to consider two sections: one within the span and one at the end of the overhang.

Within the span:

The maximum positive moment within the span occurs at the support (simply supported beam). The formula to calculate the maximum moment at the support due to a uniform distributed load is:

M_max = (wL^2)/8

Where:

M_max is the maximum moment

w is the distributed load per unit length (24 kN/m)

L is the length of the span (6 m)

Plugging in the values:

M_max = (24 kN/m * 6 m^2) / 8

M_max = 144 kN-m / 8

M_max = 18 kN-m

Therefore, the maximum positive moment within the span is 18 kN-m.

At the end of the overhang:

The maximum positive moment occurs at the end of the overhang due to the concentrated load from the overhang. The formula to calculate the maximum moment at the end of the overhang due to a concentrated load is:

M_max = P * a

Where:

M_max is the maximum moment

P is the concentrated load (24 kN/m * 1.5 m = 36 kN)

a is the distance from the support to the point of maximum moment (1.5 m)

Plugging in the values:

M_max = 36 kN * 1.5 m

M_max = 54 kN-m

Therefore, the maximum positive moment at the end of the overhang is 54 kN-m. In summary, the maximum positive moment within the beam is 18 kN-m within the span and 54 kN-m at the end of the overhang.

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Ionization energy refers to the amount of energy required to add an electron to the valence shell of a gaseous atom.
True or False?

Answers

Ionization energy refers to the amount of energy required to remove an electron from a neutral atom, creating a positively charged ion.

The ionization energy increases from left to right and from the bottom to the top of the periodic table.

The ionization energy is the amount of energy required to remove the most loosely held electron from a neutral gaseous atom, to form a positively charged ion. The amount of energy required is measured in kJ/mol.

The more energy required, the more difficult it is to remove the electron, thus the higher the ionization energy value.The first ionization energy increases as we move from left to right across a period because the number of protons increases and so does the atomic number of the elements.

This means that the effective nuclear charge increases as well, thus it becomes more difficult to remove electrons. Therefore, it takes more energy to remove the electron. Consequently, the ionization energy increases.The ionization energy also increases as we move from bottom to top in a group. This is because the valence electrons are closer to the nucleus as we move up the group. This makes it more difficult to remove the valence electrons, thus the ionization energy increases.

The statement is False. The ionization energy refers to the amount of energy required to remove an electron from a neutral atom, creating a positively charged ion.

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A concrete one-way slab has a total thickness of 120 mm. The slab will be reinforced with 12 -mm-diameter bars with fy =275MPa, Cc =21MPa. Determine the area of rebar in mm2 if the total factored moment acting on 1−m width of slab is 23kN−m width of slab is 23 kN−m. Clear concrete cover is 20 mm.

Answers

The area of rebar is approximately 17,333.86 mm^2

To determine the area of rebar in mm2, we need to consider the factored moment and the properties of the reinforcement.

Step 1: Calculate the effective depth of the slab.
Effective depth (d) = total thickness of the slab - clear concrete cover
d = 120 mm - 20 mm
d = 100 mm

Step 2: Calculate the lever arm (a).
Lever arm (a) = (d/2) + (d/6)
a = (100 mm/2) + (100 mm/6)
a = 50 mm + 16.67 mm
a = 66.67 mm

Step 3: Calculate the factored moment capacity (Mn).
Mn = (0.138 * fy * A * (d - a))/(10^6)
Where:
fy = yield strength of the reinforcement = 275 MPa
A = area of the reinforcement

We can rearrange the equation to solve for A:
A = (Mn * 10^6)/(0.138 * fy * (d - a))
A = (23 kN-m * 10^6)/(0.138 * 275 MPa * (100 mm - 66.67 mm))

Converting kN-m to N-mm:
A = (23,000 N-mm * 10^6)/(0.138 * 275 MPa * (100 mm - 66.67 mm))

Simplifying the equation:
A = (23,000,000,000 N-mm)/(37.95 MPa * 33.33 mm)

Using appropriate units for area:
A = (23,000,000,000 N-mm)/(37.95 * 10^6 N/mm^2 * 33.33 mm)
A = 17,333.86 mm^2

Therefore, the area of rebar is approximately 17,333.86 mm^2.

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This question is from Hydrographic surveying.
What is the maximum Total Vertical Uncertainty allowed for a IHO
Special Order MBES survey in 15m of water?

Answers

The maximum Total Vertical Uncertainty allowed for an IHO Special Order Multibeam Echo Sounder (MBES) survey in 15m of water is 0.08 + 0.015h, where h is the depth of the water in meters.

The International Hydrographic Organization (IHO) sets standards for hydrographic surveys. The total vertical uncertainty (TVU) is one of these requirements. It determines the maximum acceptable margin of error for the depth measurements, which are a crucial component of hydrographic surveying.

The maximum total vertical uncertainty allowed for an IHO Special Order Multibeam Echo Sounder (MBES) survey in 15m of water is 0.08 + 0.015h, where h is the depth of the water in meters. The formula for total vertical uncertainty is expressed as:

TVU = 0.08 + 0.015h

Where:

TVU = Total Vertical Uncertainty

h = Depth of the water in meters

The maximum TVU allowed varies based on the depth of the water. The formula indicates that the TVU rises as the water depth increases.

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The start of a quadratic sequence is shown below.
By first working out the nth term rule, find the 20th term of this sequence.
9, 12, 17, 24, 33,

Answers

Answer:

Rule is [tex]n^2+8[/tex]

20th term is 408

Step-by-step explanation:

Notice that [tex]n^2=1,4,9,16,25,...[/tex] so if we add 8 to each term, we get [tex]n^2+8=9,12,17,24,33[/tex]. Therefore, the 20th term would be [tex]20^2+8=400+8=408[/tex]

A 50,000 liter above ground gasoline storage tank (UST) has leaked its entire contents which penetrated into the surrounding subsurface. Contaminant hydrogeologists confirmed that a soil region in the vadose zone of 20 cubic meters held gasoline in its pore spaces due to capillary forces. The groundwater table occurs several meters below the bottom of the affected vadose zone. Based on the 5% rule, how much gasoline would you expect to be floating on the water table surface? Provide your answer answer in liters with a whole number (no decimals, no commas); Eg: 21000

Answers

The expected amount of gasoline to be floating on the water table surface would be 1,000 liters (a whole number with no decimals or commas), the correct answer is 1000.

Given:A 50,000 liter above ground gasoline storage tank (UST) has leaked its entire contents which penetrated into the surrounding subsurface.

Contaminant hydrogeologists confirmed that a soil region in the vadose zone of 20 cubic meters held gasoline in its pore spaces due to capillary forces.The groundwater table occurs several meters below the bottom of the affected vadose zone.

To Find: How much gasoline would you expect to be floating on the water table surface?Based on the 5% rule:This means that only 5% of the gasoline spilled from the tank will end up floating on the water table surface.

Thus, the amount of gasoline that would be expected to be floating on the water table surface would be 5% of the total amount of gasoline that was originally in the vadose zone.

Therefore,Total amount of gasoline in the vadose zone = 20 cubic metersSince 1 m³ = 1000 liters. Therefore, volume of gasoline in the vadose zone = 20 m³ × 1000 liters/m³= 20,000 liters

Since the entire contents of the storage tank were spilled, this is the total amount of gasoline that was originally in the vadose zone.

So,The amount of gasoline floating on the water table surface = 5% of the total amount of gasoline= 5/100 × 20,000= 1,000.

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A city averages 14 hours of daylight in June, 10 hours of daylight in December, and 12 hours of daylight
in both March and September. Assume that the number of hours of daylight varies sinusoidally over a
period of one year. Write two different equations for the number of hours of daylight over time in
months where t= 1 is January (the first month of the year), t=2 is February etc

Answers

The two equations for the number of hours of daylight over time in months are:

1) y = 2sin[(π/6)t] + 12

2) y = -2sin[(π/6)t] + 12

The given problem states that the number of hours of daylight varies sinusoidally over a period of one year. This indicates that the function that models the number of hours of daylight should be a sinusoidal function.

To find the equation for the number of hours of daylight, we need to consider the key parameters: the amplitude, period, and phase shift of the sinusoidal function.

In the first equation, y = 2sin[(π/6)t] + 12, the amplitude is 2, which represents the maximum deviation from the average of 12 hours of daylight. The period is determined by the coefficient of t, which is π/6. Since the period of one year corresponds to 12 months, the coefficient is chosen to divide the period equally among the 12 months.

The phase shift, or horizontal shift, is not explicitly mentioned in the problem, so it is assumed to be zero. Adding 12 to the equation ensures that the average daylight hours are accounted for.

In the second equation, y = -2sin[(π/6)t] + 12, the only difference is the negative amplitude (-2). This equation represents the situation where the number of daylight hours is below the average.

By using these equations, one can calculate the number of daylight hours for each month of the year based on the given sinusoidal variation.

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Which isomer of C5H12 would be the best
fuel? Why?
__________________________________________________________________
Explain how 1,2-dimethyl-cyclopropene can form geometric
isomers.
___________

Answers

The best fuel among the isomers of C5H12 would be 2,2-dimethylbutane due to its high octane rating and favorable combustion properties.

2,2-dimethylbutane, one of the isomers of C5H12, is the best fuel for several reasons. Firstly, it possesses a high octane rating, which measures a fuel's resistance to knocking in internal combustion engines. Higher octane fuels are less prone to premature combustion, ensuring a smoother and more efficient engine operation.

2,2-dimethylbutane's branched structure and symmetrical arrangement of methyl groups contribute to its high octane rating, making it a desirable choice for fuel.

Additionally, 2,2-dimethylbutane exhibits favorable combustion properties. Its compact and symmetrical structure allows for efficient vaporization and mixing with air, promoting thorough combustion. This results in a higher energy release during combustion, leading to increased power output in engines.

Furthermore, the branching of the carbon chain in 2,2-dimethylbutane reduces the likelihood of carbon chain reactions, minimizing the formation of harmful emissions such as carbon monoxide and nitrogen oxides.

In comparison to other isomers of C5H12, such as n-pentane and iso-pentane, 2,2-dimethylbutane offers superior performance as a fuel due to its higher octane rating and improved combustion characteristics. These properties make it an ideal choice for applications where efficient and clean combustion is crucial, such as in automobile engines.

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QUESTION 04 The void space in a sand taken near a river consists of 80% air and 20% water. The dry unit weight is yd=95 KN/m³ and Gs=2.7. Determine the water content.

Answers

The water content of the sand near a river is 18 percent.

Given that,

Void space in the sand near a river: 80% air and 20% water

Dry unit weight of the sand (yd): 95 KN/m³

The specific gravity of the sand (Gs): 2.7

To determine the water content, we can use the relationship between void ratio (e), porosity (n), and water content (w).

The formulas are as follows:

e = Vv / Vs

Where e is the void ratio,

Vv is the volume of voids, and

Vs is the volume of solids

n = e / (1 + e)

Where n is the porosity

w = (n × Gs)/(1 + Gs)

Where w is the water content

Given that the void space consists of 20% water, we can calculate the porosity:

n = 0.2 / (1 - 0.2) = 0.25

Next, we can substitute the porosity and specific gravity into the water content formula:

w = (0.25 × 2.7) / (1 + 2.7) ≈ 0.18

Therefore, the water content of the sand is 18%.

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Use the References to access important values if needed for this question. The following information is given for aluminum, Al, at 1 atm: Bolling point =2467.0∘C Heat of vaporization =2.52×10^3cal/g Melting point =660.0 ∘C Heat of fusion =95.2cal/g How many kcal of energy must be removed from a 37.7 g sample of liquid aluminum in order to freeze it at its normal melting point of 660.0 ∘C ? Energy removed =

Answers

3.584 kcal of energy must be removed from the 37.7 g sample of liquid aluminum to freeze it at its normal melting point of 660.0 °C.

The amount of energy needed to transform a substance from a solid to a liquid at its melting point is known as the heat of fusion.

In this case, the heat of fusion for aluminum is given as 95.2 cal/g.

and, the mass of the sample is 37.7 g.

Now, use the formula:

Energy removed = Heat of fusion × Mass

                            = 95.2 cal/g × 37.7 g

                            = 3584.24 cal

Since 1 kcal (kilocalorie) is equal to 1000 cal.

So, Energy removed = 3584.24 cal ÷ 1000

                                  = 3.584 kcal

So, 3.584 kcal of energy must be removed.

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This py file must fulfil the following requirements: i. Contain an appropriate comment header that includes the author name, the date, and the purpose of the file. Other fields that appear appropriate should be included. ii. A function that accepts a string argument and returns a value indicating if the string matches a particular regular expression. You have complete freedom to choose a return that makes sense in this context. iii. The function body evaluates the argument and determines if it is a date in the format DD[. . - ] MM [ - | - ] YYYY, where the year should accept only values starting at 2000. iv. Include a line that calls this function. (1 marks) As discussed in class regarding Alzheimer's, which of these most closely denotes 'memory' problems in people living with the disease? Trouble finding the right word to identify objects O Losing their sense of what day, time of year, location, or even current life circumstances Difficulty concentrating and thinking O Repeating statements and questions over and over A storm with a constant rainfall intensity of 1 cm/hr lasts over 8 hrs. The soil is a loam with Green Ampt parameters for loam soil are: Saturated hydraulic conductivity K-0.34 cm/h. Saturated water content 0, 0.434. Suction at the wetting front is y-8.89 cm. You are asked to determine: a) The time to ponding and the initial effective saturation of the soil if the cumulative infiltration (or total infiltration depth F) at the time of ponding is 1.39cm. b) The infiltration rate (f) and cumulative infiltration (F) at t-30 minutes. H A man drags a 72-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. The crate is tilted 25 above the horizontal, and the strap is inclined 61 above the horizontal. The center of gravity of the crate coincides with its geometrical center, as indicated in the drawing. Find the magnitude of the tension in the strap. From which point of view does the author express more sympathy for Juvencio, and why?a. First Person: Because we can sympathize with Juvencios own thoughts and feelings.b. Third Person: Because the narrator makes Juvencio out to be a pitiful old man.c. First Person: Because Juvencio shows how self-centered he is.d. Third Person: Because the narrator condemns Juvencios actions. When a voltage-gated sodium lon channel opens in a cell membrane, Na fons flow through at the rate of 1.1 x 10 ions/s. Part A What is the current through the channel? Express your answer with the appropriate units. I = _________ Value _________ Units Part B What is the power dissipation in the channel if the membrane potential is -70 mV? Express your answer with the appropriate units. P = __________ Value _______ Units