Question

What is the radius of a circle that has a circumference of 81 π square inches?

A. 9 inches
B. 18 inches
C. 40.5 inches
d. 81 inches

Answer 1

2 the reason why is because I need 5 points. Hope that helps!

Answer 2

r≈12.89

Explanation:

Using the formula

C=2πr

Solving for r

r=C

2π=81

2·π≈12.89155