The percentage of compaction of the tested soil is 92.1%.
What is Algebraic expression ?
An algebraic expression is a mathematical phrase that can include numbers, variables, and mathematical operations, such as addition, subtraction, multiplication, and division.
a) To compute the water content, we need to find the weight of water in the soil sample.
Wet unit weight of soil = (weight of wet soil)/(volume of soil)
The volume of soil can be found using the weight of sand (sand core) to fill the test hole:
Volume of soil = Volume of sand cone = (weight of sand)/(bulk density of sand)
Volume of soil = 1636 g / 15.73 = 0.104
Wet unit weight of soil = (2100 g - 1636 g) / 0.104 = 5490
The dry unit weight of soil can be found by dividing the dry weight of the soil sample by its volume:
Dry unit weight of soil = (weight of dried soil)/(volume of soil)
Dry unit weight of soil = 1827 g / 0.104 = 17558.5
b) To compute the in-place dry unit weight of tested soil, we need to know the water content of the soil.
Water content = [(weight of wet soil - weight of dry soil) / weight of dry soil] x 100%
Water content = [(2100 g - 1827 g) / 1827 g] x 100% = 14.4%
Dry unit weight of tested soil = (dry unit weight of soil) / (1 + water content)
Dry unit weight of tested soil = 17558.5 / (1 + 0.144) = 15294.3
c) To compute the percentage of compaction, we need to compare the in-place dry unit weight to the maximum dry unit weight.
Maximum dry unit weight = 18.09
Optimum moisture content = 13%
Maximum wet unit weight = maximum dry unit weight / (1 - optimum moisture content/100)
Maximum wet unit weight = 18.09 / (1 - 0.13) = 20.805
Maximum weight of soil = maximum wet unit weight x volume of soil
Maximum weight of soil = 20.805 x 0.104 = 2.161 kN
Actual weight of soil = (dry unit weight of tested soil) x (1 + water content) x volume of soil
Actual weight of soil = 15.294 x (1 + 0.144) x 0.104 = 1.990 kN
Percentage of compaction = (actual weight of soil / maximum weight of soil) x 100%
Percentage of compaction = (1.990 kN / 2.161 kN) x 100% = 92.1%
Therefore, the percentage of compaction of the tested soil is 92.1%.
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Inga is solving 2x2 + 12x – 3 = 0. Which steps could she use to solve the quadratic equation? Select three options. 2(x2 + 6x + 9) = 3 + 18 2(x2 + 6x) = –3 2(x2 + 6x) = 3 x + 3 = Plus or minus StartRoot StartFraction 21 Over 2 EndFraction EndRoot 2(x2 + 6x + 9) = –3 + 9
The three options given in the question are not the correct steps to solve the given quadratic equation.
What is quadratic equation?
A quadratic equation is a polynomial equation of the second degree, meaning it contains at least one term that is squared (raised to the power of 2).
The three steps that Inga could use to solve the quadratic equation [tex]2x^2 + 12x - 3 = 0[/tex] are:
1.Rewrite the equation in the form [tex]ax^2 + bx + c = 0[/tex], where a, b, and c are constants: [tex]2x^2 + 12x - 3 = 0.[/tex]
2.Use the quadratic formula x = [-b ± sqrt([tex]b^2[/tex] - 4ac)]/2a, where a = 2, b = 12, and c = -3, to find the values of x:
x = [-12 ± [tex]\sqrt{(12^2 - 4(2)(-3))[/tex]]/(2*2)
x = [-12 ± [tex]\sqrt{(156)[/tex]]/4
x = (-3 ± [tex]\sqrt{(39)[/tex])/2
3.Simplify the roots if possible:
x = (-3 + [tex]\sqrt{(39)[/tex])/2 or x = (-3 - [tex]\sqrt{(39)[/tex])/2
Therefore, the three options given in the question are not the correct steps to solve the given quadratic equation.
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Please someone help me I rlly don’t get this I’ll give you like 40 points
Answer:
Step-by-step explanation:
H(n)=91x(-1/7) n-1
do not know
Hope it helps the answer is the 2nd one have a great day
List the sample space for rolling a fair 12-sided die.
S = {1, 2, 3, 4, 5, 6}
S = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
S = {1}
S = {12}
The sample space for rolling a fair 12-sided die is S = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}.
What is Sample space?Sample space refers to the set of all possible outcomes or events that can occur in an experiment or random process. It is denoted by the symbol "S" and contains all the possible values, results, or states that can be observed or measured. In probability theory, the sample space is used to define the range of possible outcomes that can be observed or measured in a given experiment or event.
What is probability?Probability is a measure of the likelihood or chance of an event occurring. It quantifies the likelihood of an event happening based on the ratio of the number of favorable outcomes to the total number of possible outcomes. It is expressed as a value between 0 and 1, where 0 represents an impossible event and 1 represents a certain event.
According to the given information:
When you roll a 12-sided dice, number of dots on the uppermost face is called as outcome. Now, whenever a dice is rolled we can get either 1, 2,3,4,5,6,7,8,9,10,11 or 12 dots on the uppermost face that is now outcome.
So experiment here is "Rolling a 12-faced dice" and list of possible outcomes is "{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}".
Sample space by its definition is list of all the possible outcomes of an experiment.
S={1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}.
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138 x 14÷28+209
A. 278
B. 288
C. 298
D. 388
Answer:
A .278
Step-by-step explanation:
138 x 14÷28+209 = 1932 ÷28+209=69+209=278
| 2. Ghana recently accelerated its plan to privatize tens of thousands of state-owned firms. The estimates of the market demand and supply for the goods are given byQd = -2P + 10 and Q. = 2P-2 2 (a) Determine the equilibrium price and quantity (b) Calculate the price elasticity of demand and supply and comment on your results. (c) The government raises a concern that the free-market price might be too high for the consumers and is planning to set a price ceiling of GH¢1.5. What problem will arise out of these concerns from the Government? (d) Briefly explain 3 main effects the above problem will have on the market. (e) Suggest some measures that the Government should adopt to make price ceiling effective. Now suppose the Government imposed a per tax 2 Ghana cedis on the quantity supplied calculate the consumer and producer surplus before and after the imposition of the tax.
Answer all the questions to get 60 points
What did Archimedes discover in the bath? Why was he so excited? Describe the discovery using geometric terms. What do you predict Archimedes did next with his new discoveries? Explain.
According to the popular legend, Archimedes discovered a principle of buoyancy while taking a bath.
what was his discovery ?
He realized that the volume of water displaced by his body was equal to the volume of his body. This insight led him to formulate the principle of buoyancy, which states that an object placed in a fluid experiences an upward force equal to the weight of the fluid it displaces.
Archimedes was reportedly so excited by this discovery that he ran through the streets of Syracuse shouting "Eureka!" (meaning "I have found it" in Greek). This principle has numerous practical applications, including in shipbuilding and the design of submarines and other underwater vehicles.
In geometric terms, the principle of buoyancy can be explained using the concept of displacement. When an object is submerged in a fluid, it displaces a certain volume of fluid, which is equal to the volume of the object. This volume of fluid has weight, and the fluid exerts an upward force on the object that is equal to the weight of the displaced fluid. This is what causes objects to float in water or other fluids, as long as their weight is less than the weight of the fluid they displace.
As for what Archimedes did next with his new discoveries, it's difficult to say for certain, as there are many stories and legends about his life. However, we do know that he was a prolific inventor and mathematician, and he likely continued to explore the implications of his principle of buoyancy and other discoveries. He may have also used this principle in his work as an engineer and designer, creating new machines and devices that were more efficient and effective thanks to his insights into fluid mechanics.
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Please help! (40 points) Find the common ratio for this geometric sequence. 1 1 1 2'8'32 8, 2, A.1 4 O A. B. 12/1 O B. O C. 4 OD. 2
Answer:
[tex]\textsf{A.} \quad \dfrac{1}{4}[/tex]
Step-by-step explanation:
Given geometric sequence:
[tex]8,\;2,\;\dfrac{1}{2},\;\dfrac{1}{8},\;\dfrac{1}{32}[/tex]
The common ratio for a geometric sequence can be found by dividing a term by the previous term.
[tex]\implies r=\dfrac{a_2}{a_1}=\dfrac{2}{8}=\dfrac{2 \div 2}{8 \div 2} =\dfrac{1}{4}[/tex]
Therefore, the common ratio for the given geometric sequence is 1/4.
During the exponential phase, the E-Coli bacteria in a culture increase at a rate proportional to the current population. The growth rate is found to be 1.9% per minute and the current number of E.Coli present is 172. How many E.Coli will be present in 8.5 minutes? Round your answer to the nearest
a. 203.5 bacteria
b, 754.5 bacteria
c. 201.8 bacteria
d. 1465248.9 bacteria
The answer is (a) 203.5 bacteria, rounded to the nearest whole number.
What is percentage?Percentage is a way of expressing a number or proportion as a fraction of 100. It is represented by the symbol "%".
The growth rate of E.Coli is given as 1.9% per minute, which can be expressed as 0.019 per minute as a decimal.
Let N(t) be the number of E.Coli present at time t. Then, we can write the differential equation governing the population growth as:
dN/dt = rN,
where r is the growth rate (0.019 per minute in this case).
The general solution to this differential equation is:
N(t) = [tex]N0e^{(rt)}[/tex]),
where N0 is the initial population size.
We are given that the current number of E.Coli present is 172, so N0 = 172. We want to find N(8.5), so we plug in t = 8.5 and solve:
N(8.5) = [tex]172e^{0.019*8.5}[/tex] ≈ 203.5
Therefore, the answer is (a) 203.5 bacteria, rounded to the nearest whole
number.
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Find the unknown length in the right
triangle.
?
11ft
23ft
Find the value of x.
Answer:
23°
Step-by-step explanation:
46 = 2x (Vertically opp. angles)
x = 46÷2
x = 23
Hope this helps!
pls like and mark as brainliest
Answer:
x = 23°
Step-by-step explanation:
46 = 2x
46/2 = 2x/2
x = 23°
A college cafeteria is looking for a new dessert to offer its 4,000 students. The table shows the preference of 225 students.
Ice Cream Candy Cake Pie Cookies
81 9 72 36 27
Which statement is the best prediction about the scoops of ice cream the college will need?
The college will have about 480 students who prefer ice cream.
The college will have about 640 students who prefer ice cream.
The college will have about 1,280 students who prefer ice cream.
The college will have about 1,440 students who prefer ice cream.
Therefore , the solution of the given problem of unitary method comes out to be 1,440 students who favor ice cream
An unitary method is what?The task may be completed using this generally accepted ease, existing variables, and any important components from the original Diocesan customizable query. If so, you might get another opportunity to work with the object. Otherwise, algorithmic evidence will no longer be affected by any significant factors.
Here,
The table shows that 81 of the 225 students favor ice cream.
Out of the 4,000 students, we can use the following proportion to estimate how many favor ice cream:
=> 81/225 = x/4000
If we cross-multiply, we obtain:
=> 225x = 81 * 4000
If we simplify, we get:
=> 225x = 324,000
By multiplying both parts by 225, we obtain:
=> x = 1440
The college will have about 1,440 students who favor ice cream, so that is the best guess as to how many scoops of ice cream the college will require.
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90
17. What is matrix A + matrix B?
OA
[12
6
26
The sum of the matrices A + B is 5 8
2.6 2
To add two matrices, they must have the same dimensions (the same number of rows and the same number of columns).
To add two matrices A and B, you can add the corresponding elements of the two matrices and place the result in the corresponding position of a new matrix C.
In mathematical notation, if A and B are two matrices of the same dimensions, then the sum C = A + B is defined by:
C[i,j] = A[i,j] + B[i,j]
Using the above as a guide, we have the following:
A + B = 5 8
2.6 2
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Write equation of the graph Below. (EASY! 10 Points)
Using these limitations, determine the distance from the coal tray if the coal tray is 25 inches in width and when y = 0.685. Please see screenshot
Therefore, the distance from the coal tray is approximately 301.96 inches when the heat intensity is 0.685 and the width of the coal tray is 25 inches.
How is distance determined?We can write the following using the formula in the question:
[tex]P = 100/(1 + d^2)[/tex]
where d represents the proportion of the food's distance from the coals to the tray's width.
Substituting d = z/25 results in:
[tex]P = 100/(1 + (z/25)^2)[/tex]
With y = 0.685, we can replace P with P = 0.685 and find z:
[tex]0.685 = 100/(1 + (z/25)^2)[/tex]
By dividing the two sides by [tex](1 + (z/25)^2)[/tex], we get at:
[tex]0.685 + 0.685(z/25)^2 = 100[/tex]
If we simplify, we get:
[tex](z/25)^2 = (100/0.685) - 1(z/25)^2 = 145.9854[/tex]
When we square the two sides, we obtain:
[tex]z/25 = 12.0783z = 25*12.0783z = -25*12.0783[/tex]
Given that z cannot be negative, we decide:
Z=25 * 12.0783 * 301.9575 inches
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3. Find the composition (f ∘ g)(–2) for the functions f(x) = 2x + 1 and g(x) = x2 – 3.
SHOW YOUR WORK PLEASE
The composition (f ∘ g)(–2) = 3.
What is Function ?
In mathematics, a function is a relation between two sets of values, where each value in the first set (called the domain) is associated with exactly one value in the second set (called the range). A function can be represented by a formula or an equation, which specifies how the input values are transformed into output values.
To find the composition (f ∘ g)(–2), we need to apply the function g to –2 first, and then apply the function f to the result. Here's how we can do it:
First, we need to find g(–2) by substituting –2 for x in the expression for g(x):
g(–2) = (–2)2 – 3
g(–2) = 4 – 3
g(–2) = 1
Now that we have found g(–2) = 1, we can substitute it for x in the expression for f(x) to find f(g(–2)):
f(g(–2)) = 2(1) + 1
f(g(–2)) = 3
Therefore, the composition (f ∘ g)(–2) = 3.
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Describe the transformations:
f(x) = 2(x-4)²-1
stretch by 2, left 4, down 1
stretch by 2, right 4, down 1
stretch by 2, right 3, down 1
O right 8, down 1
Answer:
stretch by 2, right 4, down 1
Step-by-step explanation:
In a function in the form:
f(x) = a(x - h)² + k
the number in front, a, shows vertical stretch (if its bigger than 1. Its a shrink or smash if its a fraction less than 1)
Horizontal shifts are shown in close next to the x, inside the parenthesis shown here with an h. Horizontals shifts are maybe the opposite of what you might think they should be. + anumber is a left shift and - anumber is a right shift.
Vertical shifts are shown by a number tacked onto the end of the equation, k These shifts are more intuitive. + anumber shifts up and - anumber shifts down.
For your equation:
f(x) = 2(x-4)²-1
The 2 is a vertical stretch. The -4 by the x is a right shift 4. The -1 tacked into the end is a shift down 1
Write an equation for H, the number of times Noah’s beats in m minutes?
The equatiοn fοr H, the number οf times Nοah’s beats in m minutes is H = k * m
What is the equivalent expressiοn?Expressiοns that perfοrm the same functiοn regardless οf appearance are said tο be equivalent. If twο algebraic expressiοns are equivalent, then they have the same value when the same variable value is used.
Assuming yοu meant "Nοah's heart beats", the equatiοn fοr H, the number οf times Nοah's heart beats in m minutes can be given by:
H = k * m
where k is a cοnstant that represents the number οf heartbeats per minute.
The value οf k may vary depending οn the individual and their physical cοnditiοn.
Hence, the equatiοn fοr H, the number οf times Nοah’s beats in m minutes
is H = k * m
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Complete Question;
A persons resting heart rate is typically between 60 and 100 beats per minute. Nοah looks at his watch, and counts 8 heartbeats in 10 seconds.
Is his heart rate typical? Explain how you know.
Write an equation for h, the number of times Noahs heart beats (at this rate) in m minutes.
Test for associativity:
The associative law holds in all three composition tables.
No matter how they are arranged, integers can be multiplied and added together according to the associative property. We refer to the numbers in the parenthesis as grouping (). Let's imagine that you are adding three integers, 2, 5, and 6. It doesn't matter how we add the numbers together—using the formulas 2 + (5 + 6) or 2 + (5) + 6—the outcome will be the same. The multiplication equation is consistent: Equals to (2 x 5) x 6 is (2 x 5) x 6. The commutative characteristic is almost identical to this one when only two integers are used.
In the given composition tables the law of associativity is followed
a(bc) = (ab)c
from 13,
a(a) = bc
a = a
The associative law holds in all three composition tables
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ANWSER FOR QUESTION 12
75 points and will give brainly
Answer:
90°
Step-by-step explanation:
Since CD is a tangent to circle B and BA is the circle's radius, the tangent to the radius forms a right angle at the point of contact:
∠BAD = 90°
in your own words, describe how to plot or graph an ordered pair of numbers.
Identify the two numbers in the ordered pair, locate the x-axis and y-axis on the plane, move along the x-axis to the position corresponding to the first number, move vertically along the y-axis to the position corresponding to the second number, mark the point with a dot or small circle, and connect the dots to show patterns.
How to plot or graph an ordered pair of numbers?The procedures below must be followed in order to plot or graph an ordered pair of integers, usually known as a point, on a two-dimensional plane:
Find the two numbers that make up the ordered pair. The position of the point on the x-axis is shown by the first number, while its location on the y-axis is indicated by the second number.On the plane, find the x- and y-axes. The y-axis is the vertical axis that runs up and down, and the x-axis is the horizontal axis that travels left to right.Move along the x-axis to the location corresponding to the first number in the ordered pair starting from the origin, which is the location where the x-axis and y-axis intersect (often represented by the coordinates (0, 0)).Move up the y-axis vertically until you are in the position that corresponds to the second number in the ordered pair.The position of the ordered pair on the two-dimensional plane is determined by the intersection of the two lines.Make a little circle or a dot to symbolize the point on the graph.If you need to plot more than one point, follow the instructions above for each additional point, identifying each one with a different symbol or color.To demonstrate any patterns or trends in the data, finish by connecting the dots.To know more about graph, visit
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The equation x + 3y= 8 is graphed which point represents a solution for this equation
To find a point that represents a solution for the equation x + 3y = 8, we need to find a point (x,y) that satisfies this equation. One way to do this is to choose a value for x, and then solve for y. For example, if we let x = 2, we have:
2 + 3y = 8
Subtracting 2 from both sides, we get:
3y = 6
Dividing both sides by 3, we get:
y = 2
So the point (2,2) is a solution for the equation x + 3y = 8. To check, we can substitute x = 2 and y = 2 into the equation:
2 + 3(2) = 8
8 = 8
This is true, so (2,2) is a solution for the equation.
Alternatively, we could choose a value for y and solve for x. For example, if we let y = 0, we have:
x + 3(0) = 8
x = 8
So the point (8,0) is also a solution for the equation x + 3y = 8.
Simple Intrest Rate
3.25%
Martin deposits $7,000 in an account at Victory Bank. Find the amount of interest earned and the total value of his account after 36 months.
The total value of Martin's account after 36 months is $7,682.50. $682.50 in interest was earned.
Determine the x- and y- intercepts for the graph defined by the given equation.
y = x + 8
a.
x-intercept is (0, 8)
y-intercept is ( -8, 0)
c.
x-intercept is ( -8, 0)
y-intercept is (0, 8)
b.
x-intercept is (0, -8)
y-intercept is ( 8, 0)
d.
x-intercept is ( 8, 0)
y-intercept is (0, -8)
Please select the best answer from the choices provided
Answer:
c
Step-by-step explanation:
To find the x-intercept, we set y to 0 and solve for x:
0 = x + 8
x = -8
Therefore, the x-intercept is -8.
To find the y-intercept, we set x to 0 and solve for y:
y = 0 + 8
y = 8
Therefore, the y-intercept is 8.
Hopes this helps
Evaluate the following expression
6^-3
Answer:
Exact Form: 1/216
Step-by-step explanation:
Find the middle term of the expansion of (2x/y^3)^12
To find the middle term of the expansion of (2x/y^3)^12, we need to first determine the number of terms in the expansion.
Using the formula for the binomial theorem, we know that the number of terms in the expansion of (2x/y^3)^12 is 13.
Now, to find the middle term, we need to find the term that is in the middle of the expansion. Since there are 13 terms in the expansion, the middle term is the 7th term.
The general term of the expansion is given by:
T(r+1) = (12 C r) (2x)^r (y^-3)^(12-r)
So, the 7th term is:
T(8) = (12 C 7) (2x)^7 (y^-3)^(5)
Simplifying this expression, we get:
T(8) = (792) (128x^7 / y^15)
Therefore, the middle term of the expansion is 792(128x^7/y^15)
P cubed equals 27.
How should I solve P??
Answer:
P = 3
Step-by-step explanation:
[tex] {p}^{3} = 27[/tex]
[tex]p = \sqrt[3]{27} = 3[/tex]
Answer:
P = 3
Step-by-step explanation:
Write down the equation:
p^3 = 27
Then divide both sides by cubed:
p = 3
Brian spent 20% of his savings on a bicycle and 15% of remainder on a book. What percentage of his savings did he have left?
Answer:
65
Step-by-step explanation:
How many three-letter passwords can be formed from the letters {A, B, J, K, X, Z} under the following circumstances. (a) If a letter can be repeated? three-letter passwords (b) If a letter cannot be repeated? three-letter passwords
The required password for different conditions are 216 and 120.
How to make the password with latter?(a) If a letter can be repeated, then we can use the multiplication principle to determine the number of possible passwords. For each of the three positions in the password, there are six choices of letters. Therefore, the total number of possible passwords is:
[tex]$6^3 = \boxed{216}$[/tex]
(b) If a letter cannot be repeated, then we can use the permutation formula to determine the number of possible passwords.
There are six choices for the first letter, five choices for the second letter (since one letter has already been used), and four choices for the third letter (since two letters have already been used). Therefore, the total number of possible passwords is:
[tex]$P(6,3) = 6 \times 5 \times 4 = \boxed{120}$[/tex]
Thus, required password for different conditions are 216 and 120.
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The algebraic rule for a reflection over the y-axis is
Answer:
(x, y) → (-x, y)
Step-by-step explanation:
The coordinates of the points that make up the function are equal to (x, y).
If we reflect the function over the y-axis, the sign of the y-value stays the same due to still being on the same side of the x-axis. The x-value sign will be the opposite of its current value due to being reflected over the y-axis.
This leads us to the algebraic expression:
(x, y) → (-x, y)