## Algebra and Trigonometry 10th Edition

$A=\pi a(20-a)$ (Area A=300) $300 = \pi a(20-a)$ $300/\pi = 20a - a^2$ $a^2-20a-300/\pi=0$ Use the quadratic formula to find the roots of the quadratic equation that are a = 12.123, 7.877