Answer
$64$
Work Step by Step
As per definition of square root property,we have ${p}^{\frac{3}{2}}=\sqrt {p^3}$
Thus, the given radical term can be written as:
$(16)^{\frac{3}{2}}=\sqrt {16^3}=4^3$
or, $=64$
Thus, $\sqrt {16^3}=64$
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