solve this trigonometric equation cos²x =3sin²x

The area of the shaded sector is 461.7 [tex]yd ^ {2}[/tex]

The shaded region in the given question is a sector. So, we will calculate the area of the sector. The area of a sector is nothing but a fraction of the area of the whole circle. So, we will use the given formula to find the area of a sector of the circle.

area of sector = [tex]\frac{angle of sector}{360} * \pi r^{2}[/tex]

We know that the angle of the sector is 167 degrees and the radius of the circle is given to be 17.8 yd. We will substitute these values in the formula to calculate the area.

area of sector =   [tex]\frac{167}{360} * \pi * (17.8)^{2}[/tex]

area of sector = 461.7 [tex]yd^{2}[/tex]

Therefore the area of the shaded region to the nearest tenth is 461.7 square yards.

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The complete question is "Find the area of the shaded sector.

round to the nearest tenth.

167°

17.8 yd

area = [ ? ]yd?

The image is shown below."

The actual interest paid by Anita is $2949.44 - $2600 = $349.44 (rounded to the nearest cent).

In this case, we have:

P = $2600

r = 0.14 (14%)

n = 12 (compounded monthly)

t = 1 (one year)

Plugging in the values, we get:

A = $2600(1 + 0.14/12)^(12*1)

= $2600(1.0116667)^12

= $2949.44

Interest refers to the amount of money charged by a lender to a borrower for the use of borrowed funds. It is typically expressed as a percentage of the amount borrowed and is usually charged over a specified period of time, such as a month or a year.

Interest can be either simple or compound. Simple interest is calculated only on the principal amount borrowed, while compound interest is calculated on the principal amount as well as any accumulated interest. This means that with compound interest, the borrower ends up paying more in interest over time. Interest rates can vary depending on a range of factors, such as the borrower's credit score, the length of the loan, and prevailing market conditions. In general, higher-risk borrowers are charged higher interest rates, while lower-risk borrowers are charged lower rates.

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Answer:

The y intercept of the scatterplot is 250 sweat shirts and the slope is 10/3

What is a linear function?

y = mx + b

where m is the rate of change and b is the y intercept.

Let y represent the number of sweat shirts sold and x represent the temperature.

The y intercept is at (0,250).

Using point (0,250) and (14,200):

Slope = (200-250) / (15-0) = 10/3

The y intercept of the scatter plot is 250 sweat shirts and the slope is (10/3)

The marked point under (x, y) are (-4,-6), (-3,-5), (-2,-4), (-1,-3), (0,-2), (1,-3), (2,-4), (3,-5) and (4,-6), under the condition that (A) y=x-2, (B) y=-x-2, (C) y=|x|-2.
Point A
where y=x-2.
This projects that for every x value, y will be 2 less than that x value. So if we place in x=0, we get y=-2. If we plug in x=1, we get y=-1 and so on. So we could plot these points on the coordinate plane as (0,-2), (1,-1), (2,0), (3,1) .

Then, similarly point B
where y=-x-2.
This projects that for every x value, y should be 2 less than the negative of that x value. So if we place in x=0, we get y=-2. If we place in x=1, we get y=-3 and .
Then, we can place these points on the coordinate plane as (0,-2), (1,-3), (-1,-1), (2,-4) .

Finally let's proceed on to point C where y=|x|-2. This projects that for every positive x value, y will be 2 less than that x value and for every negative x value, y will be 2 less than the negative of that x value. So if we plug in x=0, we get y=-2. If we plug in x=1, we get y=-1 and so on.
So we can place these points on the coordinate plane as (0,-2), (1,-1), (-1,-1), (2,0), (-2,0) and so on.

So all the evaluated points are (-4,-6), (-3,-5), (-2,-4), (-1,-3), (0,-2), (1,-3), (2,-4), (3,-5) and (4,-6).

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Jesus' net bi-weekly pay is $856.69 after paying his taxes and deductions.

To find Jesus' net bi-weekly pay, I followed these steps:

Calculate Jesus' commission: Jesus sold $16,200 of computer equipment, so his commission is 5.5% of $16,200, which is $891.

Calculate Jesus' gross bi-weekly pay: Jesus receives a bi-weekly salary of $300 plus his commission of $891, so his gross bi-weekly pay is $1,191.

Calculate Jesus' deductions: Jesus pays 8% for State Income Tax, 12.3% for Federal Income Tax, 6.3% for Social Security, and 1.45% for Medicare. To calculate the deductions, I multiplied his gross bi-weekly pay by each percentage rate:

State Income Tax: 8% of $1,191 = $95.28

Federal Income Tax: 12.3% of $1,191 = $146.67

Social Security: 6.3% of $1,191 = $75.09

Medicare: 1.45% of $1,191 = $17.27

Subtract the deductions from the gross bi-weekly pay: To find Jesus' net bi-weekly pay, I subtracted the total deductions of $334.31 from his gross bi-weekly pay of $1,191:

Net bi-weekly pay = $1,191 - $334.31 = $856.69

Therefore, Jesus' net bi-weekly pay is $856.69 after paying his taxes and deductions.

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The length of leg of given triangle is s 13√(2) units.

A 45-45-90 triangle is a special right triangle in which the two legs are congruent and the angles opposite the legs are both 45 degrees. The hypotenuse is the longest side of the triangle and is located opposite the right angle.

In this problem, we are given that the hypotenuse length of a 45-45-90 triangle is 26 units. Our goal is to find the length of one of the legs of the triangle. Let us denote the length of one of the legs as x.

By the Pythagorean theorem, we know that the sum of the squares of the two legs of a right triangle is equal to the square of the hypotenuse. In a 45-45-90 triangle, the two legs are congruent, so we can set up the following equation:

x² + x² = 26²

Simplifying the left-hand side of the equation, we get:

2x² = 676

Dividing both sides by 2, we get:

x² = 338

Taking the square root of both sides, we get:

x = √(338)

Since we are asked to give the answer in simplified radical form, we can write:

x = √(2 × 169) = √(2) × √(169) = 13√(2)

Therefore, the length of one of the legs of the 45-45-90 triangle with a hypotenuse length of 26 units is 13√(2) units.

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The segment lengths are given as follows:

6. AB = 15.

7. RS = 47.

The length of segment TU is obtained applying the trapezoid midsegment theorem, which states that the length of the midsegment of the trapezoid is equals to the mean of the length of the bases of the trapezoid.

For item 6, we have that the mean of AB = x and 29 is of 22, hence:

(x + 29)/2 = 22

x + 29 = 44

x = AB = 15.

The value of x in item 7 is obtained as follows:

3x + 5 = (2x + 15 + 6x - 37)/2

8x - 22 = 6x + 10

2x = 32

x = 16.

Hence the length of RS is given as follows:

RS = 2 x 16 + 15

RS = 47.

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The interest earned on Option A is $2400 and Option B is $666.18.  Option A is the better option as Option A has a higher total value of $5400 compared to Option B's total value of $3666.18.

To calculate the interest earned and total value for each option, we can use the following formulas:

For Option A:

- Interest earned = principal x rate x time = 3000 x 0.04 x 20 = $2400

- Total value = principal + interest earned = 3000 + 2400 = $5400

For Option B:

- Interest earned = principal x (1 + rate/n)^(n x time) - principal = 3000 x (1 + 0.02/1)^(1 x 10) - 3000 = $666.18

- Total value = principal + interest earned = 3000 + 666.18 = $3666.18

Therefore, the interest earned and total value for each option are as follows:

Option A:

- Interest earned = $2400

- Total value = $5400

Option B:

- Interest earned = $666.18

- Total value = $3666.18

To compare the two options, we need to consider the total value of each option. Option A has a higher total value of $5400 compared to Option B's total value of $3666.18. Therefore, Option A is the better option.

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The second-period interest is approximately $13.61, and the second-period amount is approximately $927.11.

To find the second-period interest and amount, we first need to determine the quarterly interest rate, since the interest compounds quarterly.

Quarterly interest rate =[tex](1 + Annual interest rate)^(1/4) - 1[/tex]

= [tex](1 + 0.06)^(1/4) - 1[/tex]

≈ 0.014889

Second-period interest:

Calculate the new principal after the first period.

Principal_after_1st_period = Principal + First period interest

= $900 + $13.50

= $913.50

Calculate the second-period interest.

Second_period_interest = Principal_after_1st_period × Quarterly interest rate

= $913.50 × 0.014889

≈ $13.61

Second-period amount:

Second_period_amount = Principal_after_1st_period + Second_period_interest

= $913.50 + $13.61

≈ $927.11

The second-period interest is approximately $13.61, and the second-period amount is approximately $927.11.

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16. The length of each side of the original garden is 12 meters. The answer is (C) 12m.

17The value of c that makes x^2-11x+c a perfect-square trinomial is (B) 121/4..

18.The answer is (D) -1. 1, -9. 1.

Step by step explanation

16. Let s be the length of each side of the original garden. Then the area of the original garden is s^2. If each side is increased by 3 meters, then the new length of each side is s+3, and the area of the expanded garden is (s+3)^2. We are given that the area of the expanded garden is 225 square meters. Therefore, we can write the equation:

(s+3)^2 = 225

Taking the square root of both sides, we get:

s+3 = 15 or s+3 = -15

The second equation has no solution, since the length of a side cannot be negative. Therefore, we have:

s+3 = 15

Subtracting 3 from both sides, we get:

s = 12

17. To make x^2-11x+c a perfect-square trinomial, we need to add and subtract a constant term to make it a square of a binomial. Specifically, we want to add and subtract (11/2)^2 = 121/4 to get:

x^2 - 11x + c + 121/4 - 121/4

= (x - 11/2)^2 + (4c - 121)/4

For this to be a perfect-square trinomial, we need (4c - 121)/4 to be equal to 0. Therefore, we have:

4c - 121 = 0

Solving for c, we get:

4c = 121

c = 121/4

18. To solve the equation x^2 + 8x = 10 by completing the square, we first move the constant term to the right-hand side:

x^2 + 8x - 10 = 0

Next, we add and subtract the square of half the coefficient of x, which is (8/2)^2 = 16:

x^2 + 8x + 16 - 16 - 10 = 0

We can then write the left-hand side as a perfect-square trinomial:

(x + 4)^2 - 26 = 0

Adding 26 to both sides, we get:

(x + 4)^2 = 26

Taking the square root of both sides, we get:

x + 4 = ±√26

Subtracting 4 from both sides, we get:

x = -4 ±√26

Rounding to the nearest tenth, the solutions are approximately:

x ≈ -7.1 and x ≈ -0.9

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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 expected number of tosses until two players get different results when simultaneously tossing a coin each with a chance of heads p is (1-2p)/(2p-2p²).

The probability that both players get the same result (either both heads or both tails) on any given toss is p² + (1-p)² = 2p² - 2p + 1. The probability that they get different results (one head and one tail) is therefore 1 - (2p² - 2p + 1) = 2p - 2p².

Let E be the expected number of tosses until they end up with different results. If they get different results on the first toss, the game ends after 1 toss.

Otherwise, they have to repeat the process again, and the expected number of tosses is increased by 1. Therefore, we can express E in terms of the probabilities of getting different or same results on the first toss

E = (2p - 2p²)1 + (1 - 2p + 2p²)(1 + E)

Simplifying, we get

E = 1 + 2pE - 2p + 2p²

Rearranging and solving for E, we get

E = (1 - 2p) / (2p - 2p²)

Therefore, the expected number of tosses before the players end up with different results is (1 - 2p) / (2p - 2p²).

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The best interpretation of one of the values of the function is  The number of microorganisms increases by 16% each week.

The given function of the number of the microorganisms present in the water sample at the end of x weeks is

h(x) = 146(1.16)ˣ

To find the number of microorganisms present in the water sample after one week, we substitute x = 1 in the above equation

h(1) = 146(1.16)¹

h(1) = 169.36

Therefore, after one week, there will be approximately 169 microorganisms in the water sample.

Thus, the correct interpretation of one of the values of the function is F.

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Answer:

y-3x-2

Step-by-step explanation:

take 2 points (1,1), (3,7)

find the slope: 7-1/3-1=3

plug into y=2x+b (used pt (1,1) )

1=3(1)+b

1=3+b

b=-2

y=3x-2

Answer:

  (c)  The third arc should cross the second arc.

Step-by-step explanation:

You want to know the correction required to the construction of a copy of an angle.

To copy an angle to a new vertex, arcs are drawn with the same radius at the original vertex (first arc) and the new vertex (second arc).

Then the compass is set to the length JK, and a third arc is drawn with L as the center, marking off the distance JK on the second arc.

In order do that, the third arc should cross the second arc.

__

Additional comment

This allows you to create ∆DLM congruent to ∆BKJ. Hence angle D will be congruent to angle B.

It helps to actually do these constructions on paper using compass and straightedge. That gives you better intuition about how they work, and about geometric relations in general.

Answer:

Step-by-step explanation:

(a)The position function is:x(t) = -sin(t) + t + 5

To find the velocity function, we need to integrate the acceleration function:

v(t) = ∫ a(t) dt = -cos(t) + C1

We know that the particle is initially at rest, so v(0) = 0:

0 = -cos(0) + C1
C1 = 1

Therefore, the velocity function is:

v(t) = -cos(t) + 1

To find the position function, we need to integrate the velocity function:

x(t) = ∫ v(t) dt = -sin(t) + t + C2

Using the initial position x(0) = 5, we can find C2:

5 = -sin(0) + 0 + C2
C2 = 5

Therefore, the position function is:

x(t) = -sin(t) + t + 5

(b) The particle is at rest when its velocity is zero. So we need to solve for t when v(t) = 0:

0 = -cos(t) + 1

cos(t) = 1

t = 2πn, where n is an integer.

Therefore, the particle is at rest at times t = 2πn, where n is an integer.

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The result of the regression analysis will provide you with the best-fitting model and its R² value.

To find the model that best fits the data, we will perform a regression analysis using the given data. The dependent variable is the number of insect species, and the independent variable is the year coded as 1, 2, 3, and so on. The table can be rewritten as:

Year (X): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Species (Y): 53, 38, 49, 35, 42, 47, 60, 67, 82

A linear regression can be performed to determine the model that best fits the data. After analyzing the data, we will identify the corresponding R² value, which represents the proportion of the variance in the dependent variable (insect species) that is predictable from the independent variable (year).

The result of the regression analysis will provide you with the best-fitting model and its R² value. Keep in mind that higher R² values (closer to 1) indicate a better fit of the model to the data.

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The sample space in this problem is the total number of couples surveyed, which is 1000.

The sample space in probability refers to the set of all possible outcomes of an experiment. In this case, the experiment is the survey conducted by Bruskin and Goldring Research, and the possible outcomes are the different categories of time taken by couples before getting engaged.

The given information provides the number of couples in each category, which can be added to find the total number of couples surveyed:

Sample space = Number of couples never engaged + Number of couples engaged for less than 1 year + Number of couples engaged for 1 to 2 years + Number of couples engaged for more than 2 years

Sample space = 200 + 240 + 210 + 350

Sample space = 1000

Therefore, the sample space in this problem is 1000, which represents the total number of couples surveyed by the research firm.

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z - 9 = 10(x - 5) - 8(y - 4) this is the equation of the tangent plane at the point (5, 4, 9). (x - 5)/10 = (y - 4)/(-8) = (z - 9)/(-1). These are the symmetric equations for the normal line to the surface at the given point.

(a) To find the equation of the tangent plane to the surface z = x^2 - y^2 at the point (5, 4, 9), we first need to find the partial derivatives with respect to x and y:

∂z/∂x = 2x
∂z/∂y = -2y
Now, we evaluate these at the given points (5, 4, 9):
∂z/∂x(5, 4) = 2(5) = 10
∂z/∂y(5, 4) = -2(4) = -8
Using the tangent plane equation:
z - z₀ = ∂z/∂x (x - x₀) + ∂z/∂y (y - y₀)
Plugging in the values:
z - 9 = 10(x - 5) - 8(y - 4)
This is the equation of the tangent plane at the point (5, 4, 9).

(b) The normal vector to the surface at the given point is given by the gradient vector (∂z/∂x, ∂z/∂y, -1) = (10, -8, -1). To find the symmetric equations for the normal line, we use the point-normal form:
(x - x₀)/a = (y - y₀)/b = (z - z₀)/c
Plugging in the point (5, 4, 9) and the normal vector components (10, -8, -1):
(x - 5)/10 = (y - 4)/(-8) = (z - 9)/(-1)
These are the symmetric equations for the normal line to the surface at the given point.

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Answer:

480 - 96x = 0, so x = 5.

Domain: [0, 5]

Range: [0, 480]

The number of ways to arrange 8 letters a, b, c, d, e, f, g, h such that a appears somewhere to the right of b is: 39,600

(a) The number of ways to arrange 8 letters a, b, c, d, e, f, g, h such that a is in the first position or b is in the last position is given by:

number of arrangements with a in first position + number of arrangements with b in last position - number of arrangements with both a in first position and b in last position

= (7!) + (7!) - (6!)

Number of ways with a in first position = 7! (arrange b, c, d, e, f, g, h in the remaining 7 positions)

Number of ways with b in last position = 7! (arrange a, c, d, e, f, g, h in the first 7 positions)

Number of ways with both a in first position and b in last position = 6! (arrange c, d, e, f, g, h in the remaining 6 positions)

Therefore, the total number of ways to arrange 8 letters a, b, c, d, e, f, g, h such that a is in the first position or b is in the last position is:

7! + 7! - 6! = 10,080

(b) To find the number of ways to arrange 8 letters a, b, c, d, e, f, g, h such that a appears somewhere to the right of b, we can use complementary counting.

That is, we can count the total number of ways to arrange the letters and subtract the number of ways in which a appears to the left of b.

Total number of ways to arrange 8 letters = 8! = 40,320

To count the number of ways in which a appears to the left of b, we can fix the positions of a and b as the first two letters, and then arrange the remaining 6 letters in the remaining positions.

There are 6! ways to do this.

Therefore, the number of ways to arrange 8 letters a, b, c, d, e, f, g, h such that a appears somewhere to the right of b is:

8! - 6! = 40,320 - 720 = 39,600

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For an individual with a femur length of 49 centimeters, we can expect their height to be approximately 177.15 centimeters.

When f=49, plugging it into the formula h=62.6+2.35f, we get h=62.6+2.35(49)=177.15.

This means that for an individual with a femur length of 49 centimeters, we would expect their height to be approximately 177.15 centimeters.

This provides an estimate of the individual's height based on the relationship between femur length and height indicated by the formula. It's important to note that this is an estimate and individual variation may exist.

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To get a number greater than 5,but less than 0, Peter can use the mathematical symbol of a decimal point (.) to solve this puzzle.

If Peter places decimal point between 5 and 9, he can get a number like 5.1, 5.2, 5.3... up to 8.9, which meets the conditions of being greater than 5 but less than 9.

A decimal point (.) is a mathematical symbol. When this decimal point is placed in between two numbers, suppose x and y, then x.y means x.y is greater than x and less than y.  

So to solve the puzzle, Peter can use decimal point.

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To solve this problem, we can use substitution. Let u = 9z - 5, then du/dz = 9 and dz = du/9.

Using this substitution, we can rewrite the integral as:

∫(2/(u+5))(1/9)du

Simplifying this expression:

(2/9) ∫(1/(u+5))du

We can then solve this integral by using the formula for the natural logarithm:

(2/9) ln|u+5| + C

Substituting back in for u:

(2/9) ln|9z| + C
2 zV9z+ - 5 dz is (2/9) ln|9z| + C.


Consider the integral:
∫2z√(9z² - 5) dz

We can use the substitution method. Let's choose the substitution:
u = 9z² - 5

Now, differentiate u with respect to z:
du/dz = 18z

Solve for dz:
dz = du/(18z)

Now, substitute u and dz back into the integral and simplify:
∫(2z√u) * (du/(18z)) = (1/9)∫√u du

Now, integrate with respect to u:
(1/9)(2/3)(u^(3/2))/(3/2) + C = (2/27)u^(3/2) + C

Finally, substitute back the original expression for u:
(2/27)(9z² - 5)^(3/2) + C

So, the indefinite integral is:
(2/27)(9z² - 5)^(3/2) + C

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If you are earning $12.50/hr in a part-time job, then your gross "base-pay" after deductions is $253.48.

Your base pay is $12.50/hr and you worked for 18 hours, so the base pay would be:

⇒ $12.50/hr × 18 hrs = $225;

The tips are $4.60/hr on average, so the "total-tips" earned would be:

⇒ $4.60/hr × 18 hrs = $82.80;

To calculate the "total-deductions", we first find the total percentage deducted, which is the sum of FICA and Federal Tax Withholding:

⇒ 7.65% + 10% = 17.65%,

To find the total amount deducted, we multiply the total percentage deducted by the "base-pay" + "tips";

⇒ 17.65% x ($225 + $82.80) = $54.32,

So the pay, before any deductions, is the sum of "base-pay" and "tips";

⇒ $225 + $82.80 = $307.80;

To find the "net-pay", we subtract "total-deductions" from pay;

We have,

⇒ $307.80 - $54.82 = $253.48,

Therefore, your gross base pay is $253.48.

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Answer:

add the tips and pay together , this equals 17.10

then multiply by the 18 hours and you’ll get 307.80

Step-by-step explanation:

The set R is not a subset of I. the only subset of I from the given options is A

The set I represents all isosceles triangles.

The set E represents all equilateral triangles, and an equilateral triangle is a special case of an isosceles triangle where all sides are equal. Therefore, the set E is a subset of I.

The set S represents all scalene triangles, and a scalene triangle is not isosceles since it does not have any equal sides. Therefore, the set S is not a subset of I.

The set A represents all acute triangles, and an acute isosceles triangle is a triangle where all angles are less than 90 degrees and two sides are equal in length. Therefore, the set A is a subset of I.

The set O represents all obtuse triangles, and an obtuse isosceles triangle is a triangle where one angle is greater than 90 degrees and two sides are equal in length. Therefore, the set O is not a subset of I.

The set R represents all right triangles, and a right isosceles triangle is a triangle where one angle is equal to 90 degrees and two sides are equal in length. the only subset of I from the given options is A.

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Answer:

for the first three, divide the number by 2

for the second three, multiply by 2

9 and 11. divide the number by 2 and plug into the formula 2 * pi * radius, radius is number/2

10. plug 7 into formula 2 * pi * radius, radius = 7

Step-by-step explanation:

radius is half the length of the circle, diameter is the full length, circumference is 2 * pi * radius

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Answer:

3 m/s²

Step-by-step explanation:

We can use Newton's Second Law of Motion.  The Second Law of Motion states that acceleration is calculated by dividing the force by the mass.

[tex]A=\frac{F}{m}[/tex] with f being the force and m being the mass

We know that the force is 1,500 N and the mass is 500 kg.

So, let's substitute:

[tex]A=\frac{1500}{500}\\A=3[/tex]

So the acceleration of the cart is 3 m/s²

Hope this helps :)

The length of side b for the triangle is equal to 21.8 to the nearest tenth using the sine rule.

The sine rule is a relationship between the size of an angle in a triangle and the opposing side.

Using the sine rule;

18/sin22° = b/sin27°

b = (18 × sin27°)/sin22° {cross multiplication}

b = 21.8144

Therefore, the length of side b for the triangle is equal to 21.8 to the nearest tenth using the sine rule.

Read more about sine rule here: https://brainly.com/question/4372174

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