#### Answer

15

#### Work Step by Step

$\sqrt 225=15$, which we know because $15^{2}=15\times15=225$

Published by
Pearson

ISBN 10:
0321969359

ISBN 13:
978-0-32196-935-4

15

$\sqrt 225=15$, which we know because $15^{2}=15\times15=225$

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