Answer
$\pm 4$
Work Step by Step
This question is asking "What number squared gives $4^2$?" $4^2$ can be simplified to $16$. In this case, squaring $-4$ or $4$ leads to $4^2$, or $16$. Thus, $\sqrt{4^2}=\pm4$.
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: 9
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