Solve this: 12C11
And solve the others too

The value of the surface area of Cylinder B is, 357 cm²

We have to given that;

Cylinder A is similar to Cylinder B with a scale factor of 3:7.

And, the surface area of Cylinder A.

Let us assume that,

The value of the surface area of Cylinder B is, y.

Hence, We can formulate;

3x : 7x = 153 : y

By comparing,

3x = 153

x = 51

Thus, The value of the surface area of Cylinder B is,

y = 7x

y = 7 x 51

y = 357 cm²

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The correct equation represents the amount Kennedy makes babysitting is,

⇒ d = 7h

We have to given that,

Kennedy makes $7 per hour babysitting.

Let us assume that,

'h' represent the number of hours

And, d represent amount in dollars.

Hence, By given condition, we get;

⇒ d = 7h

Thus, The correct equation represents the amount Kennedy makes babysitting is,

⇒ d = 7h

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The formula that Kennedy uses to calculate how much money she makes babysitting is:d = 7h

We have,

Kennedy makes $7 per hour babysitting.

let "d" represents the amount of dollars Kennedy makes, and "h" represents the number of hours she babysits.

Since Kennedy earns $7 per hour, the equation can be written as

d = 7h

which relates the dollars earned (d) to the number of hours worked (h).

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Answer:

12

Step-by-step explanation:

Length AC is the total length between ABC

If we already know BC=9, and we're solving for AB, then we just subtract the total amount (AC) from BC

21-9

We get 12

Since the function approaches the same value (0) along both paths, we can claim that the limit lim(x,y)→(0,0) f(x,y) exists and is equal to 0.

Your question is asking whether the limit of the function f(x,y) exists at the point (0,0). The function f(x,y) is defined as:
f(x,y) = x^2 + y if (x,y) ≠ (0,0)
f(x,y) = 0 if x = y = 0
To verify whether the limit exists, we need to check if the function approaches a unique value as (x,y) approaches (0,0). In other words, we need to determine if lim(x,y)→(0,0) f(x,y) exists.
To verify this claim, consider the function along different paths towards (0,0). Let's examine two paths:
1) x = 0: As x approaches 0, f(0,y) = y, and the limit becomes lim(y→0) y = 0.
2) y = x: As y approaches 0 along this path, f(x,x) = x^2 + x, and the limit becomes lim(x→0) (x^2 + x) = 0.

Since the function approaches the same value (0) along both paths, we can claim that the limit lim(x,y)→(0,0) f(x,y) exists and is equal to 0.

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The credit card's effective interest rate for the year is [tex]40.51%.[/tex]%

We can use the following formula:

Effective annual interest rate is calculated as[tex](1 + APR/365)365 - 1.[/tex]

The interest is compounded everyday in this case and the APR is 33.01 percent. When we enter these values into the formula, we obtain:

Effective annual interest rate =[tex](1 + 0.3301/365)^365 - 1[/tex]

Effective annual interest rate =[tex]1.4051 - 1[/tex]

Effective annual interest rate =[tex]1.4051 - 1[/tex]

So the credit card's effective interest rate for the year is[tex]40.51%.[/tex]%

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The height of the tower is: 274.7m

To find the height of the tower, we will use the tangent trigonometric function.

The tangent function relates the angle of elevation to the ratio of the opposite side (height of the tower) to the adjacent side (distance from the observer to the tower).

In this case, the angle of elevation is 70°, and the distance from the observer to the tower is 100 meters.

The formula we will use is:

tan(θ) = opposite / adjacent

tan(70°) = height / 100m

To calculate the height, we will rearrange the formula:

height = 100m * tan(70°)

Using a calculator, we find that tan(70°) ≈ 2.747.

Therefore, the height of the tower is: 274.7m

height ≈ 100m * 2.747 ≈ 274.7m

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The question in English is:

A person observes a tower from a distance of 100m with an elevation angle of 70, with which trigonometric function would you obtain the height of the tower? Calculate the height of the tower

The difference between the volume of the sphere and the volume of the cone is approximately 838.81 cubic inches.

The volume of a sphere is given by the formula V = (4/3)πr³, where r is the radius. Thus, for a sphere with a radius of 6 inches, the volume is:

V_sphere = (4/3)π(6³) = 904.78 cubic inches

The volume of a cone is given by the formula V = (1/3)πr[tex]^{2h}[/tex], where r is the radius and h is the height. Thus, for a cone with a radius of 3 inches and a height of 7 inches, the volume is:

V_cone = (1/3)π(3²)(7) = 65.97 cubic inches

Therefore, the difference between the volume of the sphere and the volume of the cone is:

V_sphere - V_cone = 904.78 - 65.97 = 838.81 cubic inches

Hence, the difference between the volume of the sphere and the volume of the cone is approximately 838.81 cubic inches.

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The derivative of f(x) = sinº (4x) is f '(x) = 4cos (4x).

To find the derivative of f(x) = sinº (4x), we can use the chain rule.

First, we need to find the derivative of the outer function, which is sinº (4x). This can be done using the derivative of the sine function:

f '(x) = cos (4x)

Next, we need to multiply this by the derivative of the inner function, which is 4.

f '(x) = cos (4x) * 4

Simplifying this expression, we get:

f '(x) = 4cos (4x)

Therefore, the derivative of f(x) = sinº (4x) is f '(x) = 4cos (4x).

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Answer:

KM = 34

Step-by-step explanation:

Since L is the midpoint of KM that makes KL and LM equal. If LM and KL are congruent that means that the measure of KL is also 17. Therefore KM is just double 17 therefore being 34.

Solving for dz/dt, we get:

dz/dt ≈ 11.650 ft/sec.

So, after another minute, the distance between Claire and Anna is changing at a rate of approximately 11.650 ft/sec.

Hi there! To answer this question, we can use the Pythagorean theorem and implicit differentiation. Let x be the distance Claire runs east and y be the distance Anna runs north. After 1 minute, Claire has already run 12 * 60 = 720 ft. After another minute, x = 720 + 12t, and y = 7t.

Now, we can set up the Pythagorean theorem: x^2 + y^2 = z^2, where z is the distance between them. Substituting the expressions for x and y, we get (720 + 12t)^2 + (7t)^2 = z^2.

To find the rate at which the distance between them is changing (dz/dt), we need to differentiate both sides of the equation with respect to time, t:

2(720 + 12t)(12) + 2(7t)(7) = 2z(dz/dt).

Now, we can plug in the values for t = 2 minutes:

2(720 + 24)(12) + 2(14)(7) = 2z(dz/dt).

Simplifying, we get:

34560 + 392 = 2z(dz/dt).

After 2 minutes, Claire has run 12(120) = 1440 ft, and Anna has run 7(60) = 420 ft. Using the Pythagorean theorem, we can find z:

z = √(1440^2 + 420^2) ≈ 1500 ft.

Now we can find dz/dt:

34952 = 2(1500)(dz/dt).

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Explanation is in the image!

we cannot determine whether the triangles are congruent or similar based on the given information .

Neither student is correct.

To determine whether two triangles are congruent or similar, we need to compare all three pairs of corresponding angles and all three pairs of corresponding sides.

In this case, we are given two pairs of corresponding angles: angle A in triangle ABC is congruent to angle Z in triangle XYZ, and angle B in triangle ABC is congruent to angle Y in triangle XYZ. However, we do not know the measure of angle C in triangle ABC or angle X in triangle XYZ, so we cannot compare the third pair of corresponding angles.

Furthermore, we are not given any information about the lengths of the sides of the two triangles, so we cannot compare the corresponding sides.

Therefore, we cannot determine whether the triangles are congruent or similar based on the given information.

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At the beginning of the game, the total amount of money between Larbi and Aminu was 66 cedis.

Let x be the total amount of money at the beginning of the game.

After the game, Larbi lost 5/11x, so he has (1-5/11)x = 6/11x left.

Aminu gained 6 more than 1/2 of what Larbi has left, which is (1/2)(6/11x) + 6 = 3/11x + 6.

The total amount left after the game is the sum of what Larbi and Aminu have, which is (6/11x) + (3/11x + 6) = (9/11x) + 6.

Since this is equal to x (the total amount they started with), we have:

(9/11x) + 6 = x

Solving for x, we get:

x = 66.

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There are infinitely many solutions to this equation. For example, one possible solution is a = 2, b = 0. Another possible solution is a = 1, b = 2.

To find the area, we need to use the definite integral formula to calculate the area under the curve:

∫[0,4] f(x) dx = ∫[0,4] (ax + b) dx = 1/2 * a * x² + b * x |[0,4]

Substituting the limits of integration, we get:

1/2 * a * 4² + b * 4 - (1/2 * a * 0² + b * 0) = 16

Simplifying, we get:

8a + 4b = 16

Dividing by 4, we get:

2a + b = 4

Since (a,b) ≠ (0,0), there are infinitely many solutions to this equation. For example, one possible solution is a = 2, b = 0. Another possible solution is a = 1, b = 2.

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The total expenditure for raising the poultry farm is GHC 5458.60.

To calculate the total expenditure for raising the poultry farm, you need to sum up all the expenses:

1. Cost of 3 large coops at GHC650 each:

  Total cost of coops = 3 coops * GHC650/coop

                                   = GHC1950

2. Cost of 1500 day-old chicks at GHC75 for 100 chicks:

  Total cost of chicks = (1500 chicks / 100 chicks) * GHC75

                                   = GHC1125

3. Cost of 1000 bags of feed at GHC1.75 per bag:

  Total cost of feed = 1000 bags * GHC1.75/bag

                                 = GHC1750

4. Transport cost for conveying the 1000 bags of feed at 50gp (GHC 0.50) per bag:

  Total transport cost = 1000 bags * GHC0.50/bag

                                    = GHC500

5. Cost of drugs and vaccines at GHC120:

6. Other expenses amounted to GHC13.60.

Now, add up all these expenses to find the total expenditure:

= Cost of coops + Cost of chicks + Cost of feed + Transport cost + Cost of drugs and vaccines + Other expenses

= GHC1950 + GHC1125 + GHC1750 + GHC500 + GHC120 + GHC13.60

= GHC5458.60

So, the total expenditure is GHC5458.60.

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The critical numbers are 4, -4.

To find the critical numbers of the function g(v) = v³ - 48v + 6, follow these steps:

1. Find the derivative of the function, g'(v).
2. Set g'(v) equal to 0 and solve for v.
3. List the critical numbers as a comma-separated list.

Step 1: Find the derivative of the function.
g(v) = v³ - 48v + 6
Using the power rule, the derivative is:
g'(v) = 3v² - 48

Step 2: Set g'(v) equal to 0 and solve for v.
3v² - 48 = 0
Divide both sides by 3:
v² - 16 = 0
Factor the equation:
(v - 4)(v + 4) = 0
Solve for v:
v = 4, -4

Step 3: List the critical numbers.
The critical numbers of the function g(v) = v³ - 48v + 6 are v = 4, -4.

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The Gross Profit Margin Ratio for Frontier Art Gallery is 69.38%, calculated by dividing the Gross Profit by Net Sales and multiplying the result by 100 to get the percentage.

Gross Profit Margin Ratio is calculated by dividing the Gross Profit by Net Sales and multiplying the result by 100 to get the percentage

Gross Profit = Net Sales - Cost of Merchandise Sold

Gross Profit = $62,481.45 - $19,123.49

Gross Profit = $43,357.96

Gross Profit Margin Ratio = (Gross Profit / Net Sales) x 100

Gross Profit Margin Ratio = ($43,357.96 / $62,481.45) x 100

Gross Profit Margin Ratio = 69.38%

Therefore, the Gross Profit Margin Ratio for Frontier Art Gallery is 69.38%.

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The z-score of 39 is 2.8, the z-score of 18 is -1.4, the z-score of 125 is 20, the z-score of 25 is 0, and the z-score of 11 is -2.8.

To calculate the z-score of each value, we will use the formula:

z = (x - mean) / standard deviation

where x is the value, mean is the mean of the data set, and standard deviation is the standard deviation of the data set.

Given the data set has a mean of 25 and a standard deviation of 5, we can calculate the z-score for each value as follows:

For x = 39:

z = (39 - 25) / 5 = 2.8

For x = 18:

z = (18 - 25) / 5 = -1.4

For x = 125:

z = (125 - 25) / 5 = 20

For x = 25:

z = (25 - 25) / 5 = 0

For x = 11:

z = (11 - 25) / 5 = -2.8

Therefore, the z-score of 39 is 2.8, the z-score of 18 is -1.4, the z-score of 125 is 20, the z-score of 25 is 0, and the z-score of 11 is -2.8.

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The solution of the system of equations is given by the ordered pairs [10, 0] and [8, -6].

In order to graphically solve the given system of equations on a coordinate plane, we would use an online graphing calculator to create a plot of the system of equations and then determine their point of intersection;

x² + y² = 100   ......equation 1.

3x - y = 30 ......equation 2.

Based on the graph shown in the image attached above, we can reasonably infer and logically deduce that the solution to this system of equations lies in both Quadrant I and Quadrant IV, and it is represented by this ordered pairs (10, 0) and (8, -6).

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The 90% confidence interval for the mean score, μ, of all students taking the test is  (37.6, 39.6).

To find the confidence interval for estimating the population mean score, we can use the following formula:

CI = x ± z*(σ/√n)

Where:

x = sample mean score = 38.6

σ = population standard deviation (unknown)

n = sample size = 64

z = z-score for the desired confidence level, which is 1.645 for 90% confidence interval

First, we need to estimate the population standard deviation using the sample standard deviation:

s = 4.9

Next, we can plug in the values into the formula:

CI = 38.6 ± 1.645*(4.9/√64)

= 38.6 ± 1.645*(0.6125)

= 38.6 ± 1.008

= (37.6, 39.6)

Therefore, the 90% confidence interval for the mean score, μ, of all students taking the test is (37.6, 39.6).

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The constant of proportionality is 1.75.

What is proportion?

A percentage is created when two ratios are equal to one another. We write proportions to construct equivalent ratios and to resolve unclear values. a comparison of two integers and their proportions. According to the law of proportion, two sets of given numbers are said to be directly proportional to one another if they grow or shrink in the same ratio.

Given two variables x and y, y is directly proportional to x (x and y vary directly, or x and y are in direct variation) if there is a non-zero constant k such that

=> y=kx

The relation is often denoted, using the ∝ or ~ symbol, as

=> y ∝ x

and the constant ratio

=> k =y/x

In this equation y=1.75 x.

Hence the constant of proportionality is 1.75.

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The calculated t-value of 1.100 is less than the critical t-value of 2.718, we fail to reject the null hypothesis.

To test the hypothesis that regular physical exercise improves academic achievement, we will conduct a two-sample t-test for independent samples. The null hypothesis is that there is no difference in the mean academic achievement scores between the treatment group (physical exercise) and the control group (no physical exercise).

Let's calculate the mean and standard deviation for each group:

Treatment group (physical exercise):

mean = (4 + 2.67 + 3.65 + 2.11 + 3.21 + 3.6) / 6 = 3.3833

standard deviation = 0.7589

Control group (no physical exercise):

mean = (3.75 + 2.74 + 3.42 + 1.67 + 3 + 3.25 + 2.65) / 7 = 3.0071

standard deviation = 0.7037

We can now calculate the t-statistic:

t = (3.3833 - 3.0071) / sqrt((0.7589^2 / 6) + (0.7037^2 / 7)) = 1.100

The degrees of freedom for this test are 6 + 7 - 2 = 11 (assuming equal variances).

Using a t-table or a t-distribution calculator with 11 degrees of freedom and a significance level of 0.01, we find that the critical t-value is ±2.718.

Since the calculated t-value of 1.100 is less than the critical t-value of 2.718, we fail to reject the null hypothesis. We do not have enough evidence to conclude that regular physical exercise improves academic achievement.

The p-value for this test can be calculated as the probability of getting a t-value as extreme as 1.100, assuming the null hypothesis is true. Using a t-distribution calculator with 11 degrees of freedom, we find that the p-value is 0.294 (rounded to three decimal places).

Since the test result is not statistically significant (p > 0.01), we do not need to report an effect size using Cohen's d.

This test result could be reported in the literature as follows: "A two-sample t-test for independent samples was conducted to examine the effect of regular physical exercise on academic achievement, while controlling for academic aptitude. Six pairs of college students with similar GPAs were randomly assigned to either a treatment group that attended daily exercise classes or a control group. The mean academic achievement score for the treatment group was 3.3833 with a standard deviation of 0.7589, while the mean academic achievement score for the control group was 3.0071 with a standard deviation of 0.7037. The t-test result was not statistically significant (t(11) = 1.100, p = 0.294), indicating that there is not enough evidence to conclude that regular physical exercise improves academic achievement."

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The area of the polygon composed of rectangles and triangle is 52 in²

Area is the amount of space occupied by a two dimensional shape or object.

For the first right triangle:

base = 2 in, height = 6 in

Area of first right triangle = 1/2 * base * height = 0.5 * 2 in * 6 in = 6 in²

For the second right triangle:

base = 2 in, height = 6 in

Area of second right triangle = 1/2 * base * height = 0.5 * 2 in * 6 in = 6 in²

For the triangle:

base = (2 + 4 + 2) = 8 in, height = 4 in

Area of triangle = 1/2 * base * height = 0.5 * 8 in * 4 in = 16 in²

For the rectangle:

length = 4 in, width = 6 in

Area of rectangle = length * width = 4 in * 6 in = 24 in²

Area of polygon = 6 + 6 + 16 + 24 = 52 in²

The area of the polygon is 52 in²

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|x-3|+|x+2|-|x-5| can be broken down into three separate cases based on the value of x:

(x-3) + (x+2) - (x-5) = 2x + 4

(x-3) + (x+2) - (5-x) = 2x - 6

-(x-3) - (x+2) - (5-x) = -3x - 4

We break down the expression into three separate cases based on the value of x. This is because the absolute value function creates "turning points" at which the behavior of the expression changes. We analyze the expression for each case and simplify it to obtain the final answer. The answer depends on the value of x, and we must consider the expression separately for each case.

If x ≥ 5, then the expression becomes:

(x-3) + (x+2) - (x-5) = 2x + 4

If -2 ≤ x < 3, then the expression becomes:

(x-3) + (x+2) - (5-x) = 2x - 6

If x < -2, then the expression becomes:

-(x-3) - (x+2) - (5-x) = -3x - 4

Therefore, the final answer depends on the value of x. If x is greater than or equal to 5, then the answer is 2x + 4. If x is between -2 and 3, then the answer is 2x - 6. And if x is less than -2, then the answer is -3x - 4.

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the final answer is 27/125.

To evaluate [tex](3/5)^3[/tex], we simply need to multiply (3/5) by itself three times:

[tex](3/5)^3 = (3/5) * (3/5) * (3/5)[/tex]

To simplify, we can first multiply the numerators together and the denominators together:

[tex](3/5)^3 = 27/125[/tex]

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The probability that Alexandra will roll a number between 1 and 6, including 1 and 6, on a standard six-sided die can be described as "certain" or "100%."

Here's a step-by-step explanation:

1. A standard six-sided die has six faces, numbered from 1 to 6.

2. When rolling the die, each face has an equal chance of landing face up.

3. The question asks for the probability of rolling a number between 1 and 6, which includes all the possible outcomes (1, 2, 3, 4, 5, and 6).

4. Since all outcomes are covered, the probability of this event occurring is 100% or certain.

Therefore, the word or phrase that describes this probability is "certain" or "100%."

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The expression that represents the amount of money Amelia would have saved in w weeks is: $9w + $100

Amelia starts with $100 and saves an additional $9 per week for 6 weeks. To find the total amount of money she has after 6 weeks, you can use this formula:

Total money = Initial amount + (Weekly savings × Number of weeks)

Total money = $100 + ($9 × 6)
Total money = $100 + $54
Total money = $154

So, Amelia would have $154 after 6 weeks of saving.

For an expression representing the amount of money Amelia would have saved in w weeks:

Total money (w) = $100 + ($9 × w)

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If circle has diameter lm and chord pq, lm = 20 cm, and pq = 16 cm, the length of RM is 10√2 centimeters.

In a circle, a diameter is a chord that passes through the center of the circle. Therefore, the point where the diameter and the chord intersect, in this case, point R, bisects the chord.

Since LM is a diameter, its length is twice the radius of the circle, which means LM = 2r. Thus, we can find the radius of the circle by dividing the diameter by 2: r = LM/2 = 20/2 = 10 cm.

Since point R bisects the chord PQ, RP = RQ = 8 cm (half of PQ). Thus, we need to find the length of RM. To do that, we need to use the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (the longest side) is equal to the sum of the squares of the other two sides.

In this case, we have a right triangle RLM with RM as the hypotenuse, so we can use the Pythagorean theorem as follows:

RM² = RL² + LM²

RM² = (10)² + (10)²

RM² = 200

RM = √200 = 10√2 cm

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Complete question is:

Consider circle o with diameter lm and chord pq.

if lm = 20 cm, and pq = 16 cm, what is the length of rm, in centimeters?

Answer: 77

Step-by-step explanation:

Bigger Rectangle = LW  = 5x5 =25 There are 2 of those. =50

middl rectangle = LW = 5x3=15

triangles= 1/2 b h = 1/2 (3)(4) = 6 but therere are 2 so =12

Add up all shapes=50+15+12=77