Answer
$4$
Work Step by Step
Note that $16=4^2$.
Thus, the given expression is equivalent to:
$\sqrt{4^2}$
RECALL:
For $a \ge0$, $\sqrt{a^2}=a$.
Using the rule above gives:
$\sqrt{4^2} = 4$
Intermediate Algebra: Connecting Concepts through Application
by Clark, Mark; Anfinson, Cynthia
Published by
Brooks Cole
ISBN 10:
0-53449-636-9
ISBN 13:
978-0-53449-636-4
Chapter 8 - Radical Functions - 8.2 Simplifying, Adding, and Subtracting Radicals - 8.2 Exercises - Page 633: 2
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