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.

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!

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