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

Question

Quizplus · Accepted Answer

The surface area, $S$, of a sphere is given by $S = 4\pi r^2$. Substituting $r = 7.1$ inches and $\pi = 3.14$, we get $S = 4 \times 3.14 \times (7.1)^2 = 633.1$ square inches.

The Radius of a Sphere Depends on Its Surface Area SSS

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