Answer
$\pm 4$
Work Step by Step
Note that $a^\frac{1}{2}=\sqrt{a}$. This means that $16^\frac{1}{2}=\sqrt{16}$. So, what value squared yields $16$? The answer should be $-4$ and $4$, so those are the solutions.
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 4 - Exponential Functions - Exercises to Skills for Chapter 4 - Page 185: 18
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