Algebra and Trigonometry 10th Edition

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

Chapter 4 - 4.3 - Conics - 4.3 Exercises - Page 340: 88a


$A=\pi a (20-a)$

Work Step by Step

We will use the constraint $a+b=20 $ to write $A$ in terms of $a$. So, $A=\pi a b$ Therefore, $A=\pi a (20-a)$
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