Question

The radius of a circle with area A is approximately $\sqrt{\frac{A}{3}}$ . The area of a circular mouse pad is 45 square inches. Estimate its radius to the nearest tenth.

Answer 1

Answer:

A = $\pi$$r^{2}$

45 = $\pi$$r^{2}$

45/$\pi$ = $r^{2}$

14.3 = $r^{2}$

r = 3.8