#### Answer

8

#### Work Step by Step

Recall the following rule:
$(a^{b})^{c}=a^{bc}$
Thus, we obtain:
$\sqrt {64}=\sqrt {8^{2}}=(8^{2})^{\frac{1}{2}}=8^{1}=8$

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Published by
Cengage Learning

ISBN 10:
1285194055

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

8

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