#### Answer

13

#### Work Step by Step

$\sqrt 169=13$, which we know because $13^{2}=13\times13=169$

Published by
Pearson

ISBN 10:
0321969359

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

13

$\sqrt 169=13$, which we know because $13^{2}=13\times13=169$

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