Question

What is the radius of a sphere that has a surface area of 951.1 in2?

A. 6.4 in
B. 7.7 in
C. 9.8 in
D. 8.7 in

Answer 1

FORMULA FOR SURFACE AREA OF SPHERE = 4 pi r^2

r = 6 " area = 4 pi X 6 X 6 = 144 pi " squared

r = 12 "

area = 4 X pi X 12 X 12 = 576 pi" squared

ANSWER Area will be 4 times the original

Explanation:

Answer 2

The answer is D. 8.7

Explanation:

A=4πr2

Solving fore

r=1

2A

π=1

2·951.1

π≈8.69978in