Answer
$x=6.585$
Work Step by Step
$4^{x-5}+21=30$
$4^{x-5}=9$
$\log_44^{x-5}=\log_49$
$x-5=\log_49$
$x=\frac{\ln9}{\ln4}+5=6.585$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 5 - Cumulative Test for Chapters 3-5 - Page 417: 32
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