#### Answer

A = 50.24

#### Work Step by Step

Substitute the value for r into the equation:
A = $\pi(r)^{2}$
A = $\pi(4)^{2}$
Solve for A:
A = 3.14*16
A = 50.24

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

A = 50.24

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