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alexandr1967 [171]
4 years ago
9

Which statements are true regarding the area of circle D? Select two options. The area of the circle depends on the square of th

e radius. The area of circle D is 36Pi centimeters squared. The area of circle D is 324Pi centimeters squared The area of the circle depends on the square of pi. The area of the circle depends on the central angle.

Mathematics
2 answers:
SIZIF [17.4K]4 years ago
4 0

Answer:

FIRST ANSWER THIRD ANSWER

Step-by-step explanation:

NemiM [27]4 years ago
3 0

Answer:

First option.

Third option.

Step-by-step explanation:

The missing figure is attached.

For this exercise it is necessary to remember that the area of a circle can be calculated with the following shown below:

A_{circle}=\pi r^2

Where "r" is the radius of the circle.

As you can notice in the formula, the area of the circle depends on the square of the radius.

Now you must observe the picture attached.

You can identify that, in this case, the radius of the given circle is the following:

r=18\ cm

Therefore, knowing the radius, you need to substitute it into the formula given above:

A_{circle}=\pi (18\ cm)^2

Finally, you must evaluate in order to calculate the area of that circle. You get that this is:

A_{circle}=\pi (324\ cm^2)

A_{circle}=324\pi \ cm^2

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PLEASE HELP ME WITH THIS 17 points!! PLEASEEEE IM BEGGING YOU!!!
slega [8]

Answer:

x = 2

Step-by-step explanation:

Step 1: Convert to math

5x + 1 = 3x + 5

Step 2: Solve for <em>x</em>

  1. Subtract 4x on both sides: 2x + 1 = 5
  2. Subtract 1 on both sides: 2x = 4
  3. Divide both sides by 2: x = 2

Step 3: Check

<em>Plug in x to verify it's a solution.</em>

5(2) + 1 = 3(2) + 5

10 + 1 = 6 + 5

11 = 11

7 0
3 years ago
Read 2 more answers
1. Which two points lie on a line with slope 2/3?
kondaur [170]
Number one is D
number 2 is A
7 0
4 years ago
Read 2 more answers
Find the area of the shape below.<br> 11 cm<br> 14 cm<br> 9cm<br> 20 cm
pychu [463]

Answer:

pretty sure its 235 cm^2

Step-by-step explanation:

7 0
3 years ago
How much does a sleeping bag cost? Let's say you want a sleeping bag that should keep you warm in temperatures from 20°F to 45°F
BARSIC [14]

Answer:

a) Sample Mean = 79.4

Sample standard deviation = 30.62

b) 90% Confidence interval:  (67.56 ,91.24)

Step-by-step explanation:

We are given the following in the question:

Prices for sleeping bags has an approximately normal distribution.

We are given the following sample:

35, 85, 105, 40, 100, 50, 30, 23, 100, 110, 105, 95, 105, 60, 110, 120, 95, 90, 60, 70

a)

Formula:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.  

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

Mean =\displaystyle\frac{1588}{20} = 79.4

Sum of squares of differences = 1971.36 + 31.36 + 655.36 + 1552.36 + 424.36 + 864.36 + 2440.36 + 3180.96 + 424.36 + 936.36 + 655.36 + 243.36 + 655.36 + 376.36 + 936.36 + 1648.36 + 243.36 + 112.36 + 376.36 + 88.36 = 17816.8

S.D = \sqrt{\displaystyle\frac{17816.8}{19}} = 30.62

b) 90% Confidence interval:  

\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}  

Putting the values, we get,  

t_{critical}\text{ at degree of freedom 19 and}~\alpha_{0.10} = \pm 1.7291  

79.4 \pm 1.73(\displaystyle\frac{ 30.62}{\sqrt{20}} ) = 79.4 \pm 11.84 = (67.56 ,91.24)

8 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B13%7D%20" id="TexFormula1" title=" \sqrt{13} " alt=" \sqrt{13} " align="absmiddle
Fed [463]
3.605
is the answer.
8 0
3 years ago
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