#### Answer

$\frac{2}{3}$

#### Work Step by Step

Recall the following rule: $\sqrt{x^{2}}=x$. Thus, we obtain:
$\sqrt \frac{4}{9}=\sqrt \frac{2^{2}}{3^{2}}=\frac{\sqrt {2^{2}}}{\sqrt {3^{2}}}=\frac{2}{3}$

Published by
Cengage Learning

ISBN 10:
1285194055

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

$\frac{2}{3}$

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