#### Answer

$\frac{4}{9}$

#### Work Step by Step

$\sqrt {16}=4$
$\sqrt {81}=9$
so
$\sqrt {\frac{16}{81}}=\frac{4}{9}$

Published by
Pearson

ISBN 10:
0321955048

ISBN 13:
978-0-32195-504-3

$\frac{4}{9}$

$\sqrt {16}=4$
$\sqrt {81}=9$
so
$\sqrt {\frac{16}{81}}=\frac{4}{9}$

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