#### Answer

$40$

#### Work Step by Step

Recall the following rule:
$(a^{b})^{c}=a^{bc}$
Thus, we obtain:
$\sqrt {1600}=\sqrt {40\times40}=\sqrt {40^{2}}=(40^{2})^{1/2}=40^{1}=40$

Published by
Cengage Learning

ISBN 10:
1285194055

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

$40$

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