The Radius of a Sphere Depends on Its Surface Area $S$

Multiple Choice

The radius of a sphere depends on its surface area, $S$ , and is given by the formula $r=\sqrt{\frac{\mathrm{S}}{4 \pi}}$
What is the surface area of a sphere with radius of 7.1 inches? Use 3.14 for $\pi$ . Round to the nearest tenth of a square inch.

A) 89.2 square inches
B) 22.3 square inches
C) 158.3 square inches
D) 633.1 square inches