Question

The surface area of a sphere is found using the formula SA=4², where r is the radius. If the surface area of a

sphere is 144π square feet, what is the radius, in feet?
A. 6
B. 12
C. 18
D. 36

Answer 1

A

Explanation:

Surface area of sphere is 4 pi r^2

144 pi = 4 pi r^2

144 pi / (4 pi) = r^2

36 = r^2

r = 6 ft