#### Answer

$\frac{9}{5}$

#### Work Step by Step

Recall the following rule:
$(\sqrt{x})^{2}=x$
Thus, we obtain:
$\sqrt \frac{81}{25}=\sqrt \frac{9^{2}}{5^{2}}=\frac{\sqrt {9^{2}}}{\sqrt {5^{2}}}=\frac{9}{5}$

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Published by
Cengage Learning

ISBN 10:
1285194055

ISBN 13:
978-1-28519-405-9

$\frac{9}{5}$

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