Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 1 - P.S. Problem Solving - Page 157: 3c


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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