a = 12.123, 7.877
Work Step by Step
$A=\pi a(20-a)$ (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
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