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3 years ago

15

Using the formula C = 2πr, find the circumference of a circle with diameter of 28 inches. Round your answer to the nearest inch.

A. 88 in. B. 44 in. C. 28 in. D. 56 in.

2 answers:

Stolb23 [73]3 years ago

8 0

The formula given to us relates circumference with radius but we are given diameter instead. good thing we know that diameter is twice the length of radius so if diameter=28, the radius=14. therefore, using our formula, we can find the circumference:
C = 2(pi)(14)
C = 87.96
and this answer is close to 88 so the answer is A

let me know if you have any questions!!!

LiRa [457]3 years ago

5 0

Hi there! C=πd=π*28=87.96459, 87.96 rounded to the nearest tenth would be 88. Therefore, your answer is A. 88 in

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3 years ago

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QUESTION 33

The length of the legs of the right triangle are given as,

6 centimeters and 8 centimeters.

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${h}^{2} = {6}^{2} + {8}^{2}$

${h}^{2} = 36+ 64$

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QUESTION 34

The triangle has a hypotenuse of length, 55 inches and a leg of 33 inches.

The length of the other leg can be found using the Pythagoras Theorem,

${l}^{2} + {33}^{2} = {55}^{2}$

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Answer:B

QUESTION 35.

We want to find the distance between,

(2,-1) and (-1,3).

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$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Substitute the values to get,

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We want to find the distance between,

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Answer: D

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2 years ago

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