Answer
6 inches
Work Step by Step
A=$\pi$r$^{2}$
A=36
36$\pi$=$\pi$r$^{2}$
r$^{2}$=$\frac{36\pi}{\pi}$
r$^{2}$=36
r=±$\sqrt{36}$
r=±6
r=6 or r=-6
since negative result does not make sense then real solution is 6.
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 8 - Section 8.1 - Solving Quadratic Equations by Completing the Square - Exercise Set - Page 484: 84
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