## Basic College Mathematics (9th Edition)

a$\approx$314
A = $\pi$$r^{2} \pi is approximately 3.14, r is 10 mm In this formula, r is the radius of the circle .What is the area if r is 10 mm and \pi is 3.14? A = \pi$$r^{2}$ = 3.14 * $10^{2}$ (Apply exponent first) = 3.14 * 100 $\approx$314 $mm^{2}$