Answer
4
Work Step by Step
$Evaluate$ $the$ $expression:$
$$2^{\frac{1}{2}}8^{\frac{1}{2}}$$
$$2^{\frac{1}{2}}8^{\frac{1}{2}} = (2\times8)^{\frac{1}{2}}$$
$$16^{\frac{1}{2}} = \sqrt {16}$$
$$=4$$
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