find two numbers whose difference is 160 and whose product is a minimum. (smaller number) (larger number)

Answers

Answer 1

The two numbers are -80 and 80, with -80 being the smaller number and 80 being the larger number.

The product of these two numbers is (-80)(80) = -6400, which is the minimum possible value.

Let the two numbers be x and y, where x is the smaller number and y is the larger number.

Then we have:

y - x = 160 (since the difference between the two numbers is 160)

y = x + 160 (adding x to both sides)

We want to find the values of x and y that minimize their product, which is given by:

P = xy

Substituting y = x + 160, we get:

[tex]P = x(x + 160) = x^2 + 160x[/tex]

To find the minimum value of P, we take the derivative with respect to x and set it equal to zero:

dP/dx = 2x + 160 = 0

Solving for x, we get:

x = -80

Substituting x = -80 into y = x + 160, we get:

y = 80.

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Related Questions

Determine the function f satisfying the given conditions.
f ''' (x) = 12
f '' (0) = 5
f ' (0) = 3
f (0) = 1

Answers

To determine the function f satisfying the given conditions, we can use integration.

First, we integrate f'''(x) = 12 to get f''(x) = 6x + C1, where C1 is the constant of integration.

Next, we integrate f''(x) = 6x + C1 to get f'(x) = 3x^2 + C1x + C2, where C2 is the constant of integration.

Finally, we integrate f'(x) = 3x^2 + C1x + C2 to get f(x) = x^3 + (C1/2)x^2 + C2x + C3, where C3 is the constant of integration.

Using the given initial conditions, we can solve for the constants:

f''(0) = 5, so C1 = 5

f'(0) = 3, so C2 = 3

f(0) = 1, so C3 = 1

Therefore, the function f satisfying the given conditions is:

f(x) = x^3 + (5/2)x^2 + 3x + 1

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the growth curve shown depicts growth projections for a single population. a graph plots population size on the y axis and time on the x axis. an exponential curve shows slow population growth at first and then rapid increase over time. what would happen if the birth rate were to decline?

Answers

If the birth rate were to decline in a population, the growth curve would be affected as well. A decrease in the birth rate would cause the population growth to slow down, resulting in a change in the shape of the curve.

Initially, the exponential curve illustrates slow population growth, followed by a rapid increase over time. However, with a declining birth rate, the curve would likely transition into a logistic growth curve. This type of curve is characterized by an initial period of slow growth, followed by a phase of rapid growth, and eventually leveling off when the population reaches its carrying capacity or other limiting factors come into play.

The projections for the population growth would also be impacted by the decrease in the birth rate. Lower birth rates typically lead to slower growth rates, and in some cases, may even result in a population decline if the birth rate falls below the death rate. This change would be reflected in the updated projections for population growth over time.

In summary, if the birth rate were to decline in a population with an exponential growth curve, the curve would likely shift towards a logistic growth pattern, with slower overall growth and eventual leveling off. The projections for population growth would need to be adjusted to account for the changes caused by the reduced birth rate.

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Luz knows that 95 is a multiple of 5. How does this fact help her
decide if 95 is prime or composite?

Answers

The number 95 is composite number.

Given that, 95 is a multiple of 5.

A multiple in math are the numbers you get when you multiply a certain number by an integer.

Here, 95/5

= 19

95 is a multiple of 5, which means it is divisible by 5. Since it is divisible by a number other than 1 and itself, 95 is a composite number and not a prime number. This means that 95 has factors other than 1 and itself, which are 5 and 19.

Therefore, the number 95 is composite number.

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annika was having fun playing a card game. to win, she needed the next two cards dealt to be blue cards. there are 15 cards left in the deck, and five are blue. what is the probability that the two cards dealt to annika will both be blue?

Answers

The probability of drawing a blue card on the first draw is 5/15. After drawing the first blue card, there are only 4 blue cards left out of 14 cards. Therefore, the probability of drawing a second blue card is 4/14. To find the probability of both events happening (drawing two blue cards in a row), we multiply the probabilities together:

(5/15) x (4/14) = 20/210 = 2/21

So the probability of Annika winning by drawing two blue cards in a row is 2/21.


1. There are 15 cards left in the deck, and 5 of them are blue cards.

2. For the first card to be blue, the probability is the number of blue cards divided by the total number of cards left in the deck. So the probability is 5/15, which simplifies to 1/3.

3. If the first card is blue, there will be 14 cards left in the deck and 4 of them will be blue cards.

4. For the second card to be blue, given that the first card is blue, the probability is the number of remaining blue cards divided by the total number of cards left. So the probability is 4/14, which simplifies to 2/7.

5. To find the probability of both events happening together (first card is blue and second card is blue), multiply the probabilities from step 2 and step 4: (1/3) * (2/7) = 2/21.

So, the probability that the two cards dealt to Annika will both be blue is 2/21.

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Use the known formulas for the volume V of a sphere of radius rV=4π/3 r^3 and for the volume V of the pyramid with the base of area A of height h V= 1/3A. H to compute (a) JJR V16– (x – 3)^2 – (y – 5)^2 da where R is a planar domain described by the inequality (x – 3)^2 + (y – 5)^2 < 16. Answer: Σ (b) JJR 20 - 4x – 5y dA where R is a triangle in the positive octant x > 0,y> 0 in (x, y)-plane bounded by the line 5y + 4x = 20 Answer: M

Answers

The volume of the solid obtained by rotating the region R about the z-axis is 64π/3.

The volume of the solid is -100/9 cubic units.

We have,

(a)

We need to compute the volume of the solid obtained by rotating the region R about the z-axis.

This solid is the union of a hemisphere of radius 2 and a pyramid of base area A = πr^2 = 16π and height h = 2.

The volume is given by:

V = Vsphere + Vpyramid

= (4π/3)(2³) + (1/3)(16π)(2)

= (32π/3) + (32π/3)

= (64π/3)

(b)

We need to compute the volume of the solid that lies above the triangle R in the xy - plane and below the plane z = 20 - 4x - 5y.

Since the solid is bounded by a plane and a surface, we can use the formula:

V = ∬R [20 - 4x - 5y] dA

where R is the triangle bounded by the lines 5y + 4x = 20, x = 0, and y = 0 in the xy-plane.

To evaluate this integral, we need to express dA in terms of x and y.

Since the triangle is in the positive octant, we have:

dA = dxdy

Therefore, the integral becomes:

V = ∫0^4 ∫0^(5/4)(20 - 4x - 5y) dy dx

= ∫0^4 [(20/5)x - (2/5)x² - (25/24)x²] dx

= ∫0^4 [(20/5) - (2/5)x - (25/24)x²] dx

= [20x/5 - (1/5)x² - (25/72)x³]_0^4

= (16/5) - (16/5) - (500/72)

= -100/9

The volume of the solid is -100/9 cubic units.

Note that the negative sign indicates that the solid lies below the

xy - plane.

Thus,

The volume of the solid obtained by rotating the region R about the z-axis is 64π/3.

The volume of the solid is -100/9 cubic units.

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Find the standardized test statistic t for a sample with n = 12, 푥 = 30.2, s = 2.2, and α = 0.01 if H0: μ = 29. Round your answer to three decimal places.

Answers

Rounded to three decimal places, the standardized test statistic t is 1.573. To find the standardized test statistic t, we can use the formula:

t = (x - μ) / (s / √n)

Plugging in the values given in the question, we get:

t = (30.2 - 29) / (2.2 / √12)
t = 4.268

To round to three decimal places, we look at the fourth digit after the decimal point. Since it's 8 and greater than or equal to 5, we round up the third digit to get:

t ≈ 4.268

Therefore, the standardized test statistic t is approximately 4.268.
To find the standardized test statistic t for the given sample, we will use the t-score formula:

t = (x - μ) / (s / √n)

Where:
- x is the sample mean (30.2)
- μ is the population mean under the null hypothesis (29)
- s is the sample standard deviation (2.2)
- n is the sample size (12)

Plugging in the values, we get:

t = (30.2 - 29) / (2.2 / √12) ≈ 1.573

Rounded to three decimal places, the standardized test statistic t is 1.573.

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according to a report for veterinarians in the united states, 36.5 36.5 percent of households in the united states own dogs and 30.4 30.4 percent of households in the united states own cats. if one household in the united states is selected at random, what is the probability that the selected household will own a dog or a cat? responses 0.111 0. 111 0 point 1 1 1 0.331 0. 331 0 point 3 3 1 0.558 0. 558 0 point 5 5 8 0.669 0. 669 0 point 6 6 9 not enough information is given to determine the probability.

Answers

The probability that a randomly selected household in the United States owns a dog or a cat is approximately 0.558 or 55.8%.

The probability that a randomly selected household in the United States owns a dog or a cat, we need to calculate the union of the two events, which is the probability that a household owns a dog or a cat or both.

We can use the formula for the union of two events:

P(Dog or Cat) = P(Dog) + P(Cat) - P(Dog and Cat)

Where,

P(Dog) is the probability that a household owns a dog,

P(Cat) is the probability that a household owns a cat and

P(Dog and Cat) is the probability that a household owns both a dog and a cat.

Since the events "owning a dog" and "owning a cat" are not mutually exclusive (a household can own both), we need to subtract the probability of owning both to avoid double counting.

From the report,

We know that P(Dog) = 36.5% = 0.365 and P(Cat) = 30.4% = 0.304. However,

We do not have information on the probability of owning both a dog and a cat.

Assuming that owning a dog and owning a cat are independent events (which may not be a valid assumption in reality), we can estimate P(Dog and Cat) as the product of the individual probabilities:

P(Dog and Cat) ≈ P(Dog) × P(Cat) = 0.365 × 0.304 = 0.11116 (rounded to five decimal places)

Substituting the values in the formula, we get:

P(Dog or Cat) = P(Dog) + P(Cat) - P(Dog and Cat)

= 0.365 + 0.304 - 0.11116 ≈ 0.558

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how can the matrix representing a relation r on a set a be used to determine whether the relation is asymmetric?

Answers

To determine whether a relation is asymmetric, we can use the matrix representation of the relation on a set. Specifically, if a relation is asymmetric, then every entry above the main diagonal (i.e., where the row index is greater than the column index) must be 0.

This is because if (a,b) is in the relation, then (b,a) cannot be in the relation if it is asymmetric. Therefore, if the matrix representation of a relation has any non-zero entries above the main diagonal, then the relation is not asymmetric. If all entries above the main diagonal are 0, then the relation is asymmetric.
To determine whether a relation R on a set A is asymmetric using its matrix representation, follow these steps:

1. Create the matrix M representing the relation R, where M[i][j] = 1 if (a_i, a_j) is in R and M[i][j] = 0 otherwise.
2. Check the main diagonal of matrix M. If any element M[i][i] is equal to 1, the relation is not asymmetric.
3. For all other pairs (i, j), if M[i][j] = 1, ensure M[j][i] = 0. If you find any pair (i, j) where M[i][j] = M[j][i] = 1, the relation is not asymmetric.

If all these conditions hold, the relation R is asymmetric.

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Which quadrilaterals do you think can be decomposed into two identical triangles using only one line?

Please help! Hurry!

Answers

Quadrilaterals that can be decomposed into same triangles the use of only one line are called trapezoids.

The line that is used to decompose the trapezoid is called the diagonal. The diagonal of a trapezoid is a line section that connects non-parallel sides of the trapezoid. whilst the diagonal is drawn in a trapezoid, it divides the trapezoid into two triangles.

These triangles are equal due to the fact they proportion a not unusual side, which is the diagonal, and they have the identical peak, which is the distance between the parallel facets of the trapezoid. consequently, any trapezoid can be decomposed into identical triangles the use of handiest one line, that is the diagonal.

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Grace rolls a number cube 78 times. How many times can she expect to roll an odd number greater than 1?

Answers

Answer:

Like a bunch

Step-by-step explanation:

i'm sorry that's just an estimate guess :((((((((((((((((((((((((((((((((((((((

An independent premise is a premise that stands apart from the center of the argument.
TRUE or FALSE

Answers

TRUE. An independent premise is a premise that can stand alone and support the conclusion of an argument without relying on other premises.

It provides separate evidence for the conclusion, distinguishing it from dependent premises, which require other premises to support the conclusion effectively.

On the other hand, a dependent premise is a premise that cannot support the conclusion on its own and requires other premises to be persuasive. Dependent premises often serve as links between independent premises, helping to establish a chain of reasoning that leads to the conclusion.

It's essential to distinguish between independent and dependent premises because they play different roles in constructing a persuasive argument.

Independent premises provide stronger support for the conclusion because they offer separate evidence. Dependent premises, while still valuable, are weaker because they rely on other premises to be persuasive.

Therefore, constructing a sound argument requires a mix of independent and dependent premises. Independent premises provide the foundation for the argument, while dependent premises help to strengthen the connections between the independent premises and the conclusion.

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polly and percy were sharing a bag of jelly beans. the bag contained orange, lime, cherry, lemon and grape. if polly closes her eyes and pulls out the first jelly bean, what is the probability that the jelly bean is lemon? group of answer choices

Answers

Therefore, the probability that Polly selects a lemon jelly bean on the first draw is 1/5 or 0.2 (expressed as a decimal).

If the bag contains orange, lime, cherry, lemon, and grape jelly beans, and we assume that each jelly bean has an equal probability of being selected, then the probability of selecting a lemon jelly bean is:

number of lemon jelly beans / total number of jelly beans

Since we don't know how many jelly beans are in the bag, we can express this as a fraction:

number of lemon jelly beans / total number of jelly beans = ? / ?

However, we do know that there are five different flavors of jelly beans in the bag. Therefore, the total number of jelly beans in the bag must be a multiple of 5. Let's assume that there are 20 jelly beans in the bag, with 4 jelly beans of each flavor.

In this case, the probability of selecting a lemon jelly bean on the first draw is:

number of lemon jelly beans / total number of jelly beans = 4 / 20

= 1/5

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Complete question:

Polly and Percy were sharing a bag of jelly beans. the bag contained orange, lime, cherry, lemon and grape. if polly closes her eyes and pulls out the first jelly bean, what is the probability that the jelly bean is lemon?

For an arc lengths, area of sector A and central angle of a circle of radius , find the indicated quantity for the given value A 611 m?r=611 m, 0: radian (Do not round until the final answer. Then found to three decimal places as needed)

Answers

For a circle with a radius of 611m and a sector area of 611 m², the arc length is approximately 2.006 m, and the central angle is approximately 1222/373321 radians.

To find the arc length, area of sector A, and central angle of a circle with radius r=611m and given value A=611m, we can use the following formulas:

1. Arc Length (s) = r * θ
2. Area of Sector A (A) = (1/2) * r² * θ
3. Central Angle (θ) in radians

Given that the area of the sector (A) is 611 m², we can use the second formula to find the central angle (θ):

611 = (1/2) * 611² * θ

To solve for θ, we can first simplify the equation:

611 = (1/2) * 373321 * θ
θ = 1222 / 373321

Now that we have the central angle (θ), we can find the arc length (s) using the first formula:

s = 611 * (1222 / 373321)

s ≈ 2.006 m (rounded to three decimal places)

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Considere la siguiente situación:
En un grupo de tercer grado de una escuela hay 27 estudiantes. Tres de estos son hermanos. Se debe conformar la directiva del grupo eligiendo un presidente, un vicepresidente y un tesorero. Según la información brindada, ¿de cuántas maneras se puede elegir la directiva de grupo si a lo sumo uno de los tres hermanos puede ser elegido?

Answers

There are 17550 ways to choose a president, a vice president and a treasurer.

Given that, in a third grade group of a school there are 27 students. Three of these are brothers. The group's board of directors must be formed by electing a president, a vice president and a treasurer.

So, we need to find that in how many ways they should be chosen,

Using the concept of permutation,

ⁿPₓ = n! / (n-x)!

Here, n = 27, x = 3,

So,

²⁷P₃ = 27!/(27-3)!'

= 27!/(24)!

= 27 × 26 × 25 × 24! / 24!

= 27 × 26 × 25

= 17550

Hence there are 17550 ways to choose a president, a vice president and a treasurer.

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The translated question is = Consider the following scenario:

In a third grade group of a school there are 27 students. Three of these are brothers. The group's board of directors must be formed by electing a president, a vice president and a treasurer. According to the information provided, how many ways can Group Policy be chosen.

Find the standard equation of the sphere with the given characteristics. Center: (-6,0,0), tangent to the yz-plane

Answers

The standard equation of the sphere is: x^2 + 12x + y^2 + z^2 = 36.

Since the sphere is tangent to the yz-plane, the x-coordinate of the center (-6,0,0) is equal to the radius of the sphere. Let r be the radius, then we have:

r = 6

The equation of a sphere with center (h, k, l) and radius r is given by:

(x - h)^2 + (y - k)^2 + (z - l)^2 = r^2

Substituting the values of the center and radius, we get:

(x + 6)^2 + y^2 + z^2 = 36

Expanding and rearranging the terms, we obtain the standard form of the equation:

x^2 + 12x + y^2 + z^2 = 0

So, the standard equation of the sphere is:

x^2 + 12x + y^2 + z^2 = 36

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A pair of flip flops is $30. How much will they cost after a 20% discount and 6. 5% tax

Answers

The final cost of the flip flops after the discount and tax would be  $25.56.

A discount is a decrease from the item's or service's initial cost. It is a widely utilized marketing strategy to draw clients and boost revenue. Discounts may be given for a number of reasons, including to get rid of excess inventory, to advertise brand-new goods, to win over more customers, and to compete with other companies.

The discounted price is determined by deducting the discount amount from the original price.

If the flip flops cost $30 before the discount, a 20% discount would be:

$30 x 0.20 = $6 discount

So the discounted price of the flip flops would be:

$30 - $6 = $24

After applying the discount, the tax would be applied to the discounted price. A 6.5% tax on $24 would be:

$24 x 0.065 = $1.56 tax

Therefore, the final cost of the flip flops after the discount and tax would be:

$24 + $1.56 = $25.56

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"I WILL GIVE YOU A THUMBS UP IF YOU HELP ME

Suppose xy = - 3 and dy/dt = -4. Find dx/dt (x) = dt when x = 2

dx/dt = If x^² + y^2 = 13, and dt/dy = 4 when x = 2 and y= 3, what is dy/dt when x = 2 and y=3? dy/dt =

Answers

Suppose you need to find the value of dx/dt when x = 2 and xy = -3, and dy/dt = -4. We can use implicit differentiation to solve this problem.The solution will be: dx/dt = 8/3 and dy/dt = -16/9 when x = 2 and y = 3.

Differentiating both sides of xy = -3 with respect to time, we get: x(dy/dt) + y(dx/dt) = 0
Substituting the given values, we get:
2(-4) + y(dx/dt) = 0
Solving for dx/dt, we get:
dx/dt = 8/y
Now we need to find the value of y when x = 2. We can use the given equation x^2 + y^2 = 13 to solve for y:
y^2 = 13 - x^2
y^2 = 13 - 2^2
y^2 = 9
y = 3 or y = -3
Since y cannot be negative in this context, we take y = 3. Substituting this value in the expression for dx/dt, we get:
dx/dt = 8/3
Therefore, when x = 2 and xy = -3, and dy/dt = -4, we have dx/dt = 8/3.
Now, let's consider the second problem. We are given x^2 + y^2 = 13, and dt/dy = 4 when x = 2 and y = 3. We need to find dy/dt when x = 2 and y = 3.
Again, we can use implicit differentiation to solve this problem. Differentiating both sides of x^2 + y^2 = 13 with respect to time, we get:
2x(dx/dt) + 2y(dy/dt) = 0
Substituting the given values, we get:
2(2)(dx/dt) + 2(3)(dy/dt) = 0
Simplifying, we get:
4(dx/dt) + 6(dy/dt) = 0
Solving for dy/dt, we get:
dy/dt = -4/3(dx/dt)
Substituting the given value of dx/dt when x = 2, we get:
dy/dt = -4/3(8/3)
Simplifying, we get:
dy/dt = -32/9
Therefore, when x = 2 and y = 3, we have dy/dt = -32/9.

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20 POINTS!!Which coordinate plane shows the graph of the function displayed in the input/output table?

x y
0 1
1 2
2 3
3 4

Answers

Answer:

y = x + 1

Step-by-step explanation:

This is because the +1 makes every value of y one higher than the x value inputted.

find the average value of over the cube in the first octant bounded by the coordinate planes and the planes x = 4, y = 4, and z = 4 .

Answers

To find the average value of ove over the cube in the first octant bounded by the coordinate planes and the planes x = 4, y = 4, and z = 4, we need to calculate the volume of the cube and the triple integral of ove over that volume.


To evaluate this triple integral, we need to know the expression for ove. Since it is not given in the question, we cannot proceed further.

1. Identify the region of interest: The first octant is the region where x, y, and z are all non-negative. The cube is bounded by the coordinate planes (x = 0, y = 0, and z = 0) and the planes x = 4, y = 4, and z = 4.

2. Determine the volume of the cube: Since the cube has sides of length 4 (from 0 to 4 for each coordinate), its volume (V) is 4 x 4 x 4 = 64 cubic units.

3. Calculate the average value: The average value of a function over a region can be found by integrating the function over that region and dividing it by the region's volume. Since you did not provide a specific function to calculate the average value, I cannot complete this step for you. However, I can give you the general formula:

Average value = (1/V) * ∫∫∫_R f(x, y, z) dV

Here, R represents the region (the cube), f(x, y, z) is the function you want to find the average value of, and V is the volume of the region (64 in this case).

Please provide the specific function you want to find the average value of, and I can help you further.

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What is the value of x

Answers

Answer:

x=60 degrees

Step-by-step explanation:

Since they gave you the arc lengths, you have to add them all up and make it equal to 360, or write an equation:

(x+83)+(x+14)+(x+83)=360

then, first simplify the left side of the equation:

3x+180=360

then, subtract 180 from both sides:

3x=180

finally, divide both sides by 3:

x=60

So, x=60 degrees

Hope this helps! :)

help please
A family has a unique pattern in their tile flooring on the patio. An image of one of the tiles is shown.

A quadrilateral with a line segment drawn from the bottom vertex and perpendicular to the top that is 5 centimeters. The right vertical side is labeled 3 centimeters. The portion of the top from the left vertex to the perpendicular segment is 5 centimeters. There is a horizontal segment from the left side that intersects the perpendicular vertical line segment and is labeled 6 centimeters.

What is the area of the tile shown?

53 cm2
45.5 cm2
42.5 cm2
36.5 cm2

Answers

The area of the tile shown is C) 42.5 cm².

To calculate the area of the tile shown, we need to divide it into two triangles and a rectangle. The rectangle's area is the product of the length and width, which is 3 cm x 6 cm = 18 cm².

To find the area of the triangles, we need to use the formula for the area of a triangle, which is 1/2(base x height). The base and height of the left triangle are 5 cm and 6 cm, respectively. So, the area of the left triangle is 1/2(5 cm x 6 cm) = 15 cm².

The base and height of the right triangle are 3 cm and 5 cm, respectively. So, the area of the right triangle is 1/2(3 cm x 5 cm) = 7.5 cm².

Adding the areas of the rectangle and the two triangles, we get 18 cm² + 15 cm² + 7.5 cm² = 40.5 cm². Therefore, the area of the tile shown is 40.5 cm², which is closest to the option C, 42.5 cm².

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Find the limit as x goes to negative infinity, or show that it does not exist.

[tex]\lim_{x\to -\infty}(x+\sqrt{x^2 + 2x})[/tex]

Answers

The limit of the function as x goes to negative infinity is given as follows:

lim x -> -∞ f(x) = -1.

How to obtain the limit?

The limit for the function in this problem is defined as follows:

[tex]\lim_{x \rightarrow -\infty} (x + \sqrt{x^2 + 2x})[/tex]

The limit of the sum is given by the sum of the limits, hence:

[tex]\lim_{x \rightarrow -\infty} x + \lim_{x \rightarrow -\infty} \sqrt{x^2 + 2x}[/tex]

For the first limit, we just replace, hence it is of negative infinity.

For the second limit, we have that sqrt(x²) = |x|, hence we can divide by x^2 inside the square root, hence:

sqrt(1) = 1.

Then the limit is given as follows:

-∞ - 1 = -1.

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assuming the population trend continued in the same manner, what would be a reasonable estimation for what the population of the united states was in 2010?

Answers

By using previous years' population data and calculating the annual growth rate, we can estimate the population of the United States in 2010, assuming the population trend continued in the same manner.

To estimate the population of the United States in 2010, we can use the population growth trend from previous years. Here's a step-by-step explanation:

1. Collect population data: Find the population of the United States in previous years, preferably as close to 2010 as possible. For example, we can use the population data from 2000 and 2005.

2. Calculate the annual growth rate: Subtract the population in 2000 from the population in 2005, and divide the result by the population in 2000. Then, divide the result by the number of years between the two data points (5 years in this case) to get the average annual growth rate.

3. Apply the growth rate to the 2005 population: Multiply the population in 2005 by the annual growth rate, and then add the result to the 2005 population to get an estimate of the population in 2006. Repeat this process for each subsequent year until you reach 2010.

4. The estimated population in 2010: The result of step 3 for the year 2010 will be the reasonable estimation of the population in 2010, assuming the population trend continued in the same manner.


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selects the first participant using a random procedure, then selects every fourth student listed in the program roster. what type of sampling procedure is dr. anderson using?

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Dr. Anderson is using a sampling procedure known as systematic sampling. This type of sampling involves selecting every nth participant from a list or population after randomly selecting the first participant.

In this case, the first participant is selected randomly, and then every fourth student listed in the program roster is selected. This sampling technique can be useful in situations where the population is too large to sample in its entirety, but a representative sample is needed. Systematic sampling ensures that the sample is evenly distributed across the population, reducing the likelihood of bias in the sample.

Dr. Anderson is using a systematic sampling procedure. This method involves selecting the first participant randomly, and then choosing every fourth student from the program roster. Systematic sampling ensures that the sample is evenly spread across the population and reduces the risk of bias. It's efficient and easy to implement, but there's a chance of periodicity if the population has a repeating pattern. Overall, this sampling technique is useful when dealing with large populations where simple random sampling might be impractical or time-consuming.

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find the interval of one standard deviation from the mean for the given sample. round non-integer results to the nearest tenth. 61, 69, 69, 74, 85, 87, 97

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Ans .: Interval of one standard deviation from the mean = 63.5 to 90.5.

To find the interval of one standard deviation from the mean for this sample, we need to first calculate the mean and standard deviation.

The mean is found by adding up all the numbers in the sample and dividing by the total number of numbers:

(61 + 69 + 69 + 74 + 85 + 87 + 97) / 7 = 77

So the mean is 77.

To find the standard deviation, we need to calculate the variance first. The variance is found by subtracting each number in the sample from the mean, squaring the result, adding up all the squared results, and dividing by the total number of numbers:

((61-77)^2 + (69-77)^2 + (69-77)^2 + (74-77)^2 + (85-77)^2 + (87-77)^2 + (97-77)^2) / 7 = 183.43

So the variance is 183.43.

The standard deviation is the square root of the variance:

√183.43 ≈ 13.5

So the standard deviation is approximately 13.5.

To find the interval of one standard deviation from the mean, we need to subtract and add the standard deviation to the mean:

77 - 13.5 = 63.5

77 + 13.5 = 90.5

So the interval of one standard deviation from the mean for this sample is approximately 63.5 to 90.5.

We round the non-integer results to the nearest tenth, so the final answer is:

Interval of one standard deviation from the mean = 63.5 to 90.5.

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Jasmine and Peter each bought doughnuts from the same pastry shop. Jasmine spent K188 on 7
chocolate doughnut treats and 11 Raspberry rose doughnut treats. Peter spent K236 on 13 chocolate
doughnut treats and 11 Raspberry rose doughnut treats. Find the cost of one Chocolate doughnut treat
and the cost of one Raspberry rose doughnut treats

Answers

The cost of one chocolate doughnut treat is K8, and the cost of one Raspberry rose doughnut treat is K12.

We have,

Let's assume that the cost of a chocolate doughnut treat is "C" and the cost of a Raspberry rose doughnut treat is "R".

We can set up two equations:

Jasmine's purchase:

7C + 11R = 188

Peter's purchase:

13C + 11R = 236

We can use the above two equations to solve for the values of C and R.

7C + 11R - (13C + 11R) = 188 - 236

-6C = -48

C = 8

Now that we have the value of C,

We can substitute it into one of the original equations to solve for R:

7(8) + 11R = 188

56 + 11R = 188

11R = 132

R = 12

Therefore,

The cost of one chocolate doughnut treat is K8, and the cost of one Raspberry rose doughnut treat is K12.

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kara, sammy, liz, and mark each took many samples from the same population of students. the number of students in each sample is shown in the table. which person's sampling distribution was most likely to closely approximate the population distribution?

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In order to determine which person's sampling distribution closely approximates the population distribution, we need to compare the number of students in each sample to the total population of students. Without knowing the size of the population or the characteristics of the population, it's difficult to make an exact determination.

However, we can make some generalizations based on the table.

If the number of students in each sample is relatively small compared to the total population of students, then none of the individuals' sampling distributions are likely to closely approximate the population distribution. This is because small sample sizes are more likely to produce results that deviate from the true population distribution.

On the other hand, if the number of students in each sample is relatively large compared to the total population of students, then it's more likely that one of the individuals' sampling distributions will closely approximate the population distribution.

person's sampling distribution was most likely to closely approximate the population distribution, Based on the information given in the table, it appears that Mark's sampling distribution has the largest sample sizes, which makes it more likely that his sampling distribution will closely approximate the population distribution. However, without additional information about the size and characteristics of the population, we can't say for sure which person's sampling distribution is the best approximation of the population distribution.

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Lines RK , LM , RF , and NP are shown, where lines RK and LM are parallel, SRQ= (6x-40 and PSR=(12x-32) what is the value of x

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The value of x by the given data is 4/3.

We are given that;

The lines RK and LM which are parallel and SRQ= (6x-40) and PSR=(12x-32).

Now,

Since SRQ and PSR are alternate interior angles, they must be equal.

6x - 40 = 12x - 32

Solving for x gives:

6x = 8

x = 4/3

Therefore, by the angles the answer will be 4/3.

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A New York Times article reported that a survey conducted in 2014 included 36,000 ​adults, with 3.69​% of them being regular users of​ e-cigarettes. Because​ e-cigarette use is relatively​ new, there is a need to obtain​ today's usage rate. How many adults must be surveyed now if a confidence level of 99​% and a margin of error of 2 percentage points are​ wanted?

Answers

To obtain a confidence level of 99% and a margin of error of 2 percentage points, we need to survey at least 9,964 adults now.

We can use the formula for sample size calculation for a proportion:

n = [Z² × p × (1-p)] / E²

where:

n = sample size

Z = the z-score corresponding to the desired confidence level

p = the estimated proportion from the previous survey (3.69% = 0.0369)

E = the desired margin of error (2 percentage points = 0.02)

Substituting the values given in the problem, we get:

n = [Z² × p × (1-p)] / E²

n = [(2.58)² × 0.0369 × (1-0.0369)] / (0.02)²

n ≈ 9,964

Therefore, to obtain a confidence level of 99% and a margin of error of 2 percentage points, we need to survey at least 9,964 adults now.

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(1 point) For each of the finite geometric series given below, indicate the number of terms in the sum and find the sum. For the value of the sum, enter an expression that gives the exact value, rather than entering an approximation. A. 5 5(0.2) 5(0.2)2 + 5(0.2)15 number of terms = | 16 value of sum 5(0.2)9 B. 5(0.2)3 5(0.2)4 + 5(0.2)5 + number of terms = 7 value of sum =

Answers

Enter an expression that gives the exact value,  A   Sum = 5 * (1 - (0.2)^16) / (1 - 0.2), B Sum = 5(0.2)^3 * (1 - (0.2)^7) / (1 - 0.2)

A. The finite geometric series is given as: 5 + 5(0.2) + 5(0.2)^2 + ... + 5(0.2)^15. The number of terms is 16, as indicated.

To find the sum, we can use the formula for the sum of a finite geometric series:

Sum = a * (1 - r^n) / (1 - r)

where a is the first term, r is the common ratio, and n is the number of terms.

In this case, a = 5, r = 0.2, and n = 16. Plugging these values into the formula, we get:

Sum = 5 * (1 - (0.2)^16) / (1 - 0.2)

B. The finite geometric series is given as: 5(0.2)^3 + 5(0.2)^4 + 5(0.2)^5 + ... + 5(0.2)^9. The number of terms is 7.

Again, using the formula for the sum of a finite geometric series:

Sum = a * (1 - r^n) / (1 - r)

In this case, a = 5(0.2)^3, r = 0.2, and n = 7. Plugging these values into the formula, we get:

Sum = 5(0.2)^3 * (1 - (0.2)^7) / (1 - 0.2)

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