Answer
$\log_a{ 2.1}=3$
Work Step by Step
We know that if $a^x=y$, then $\log_a{y}=x$.
Hence if $a^3=2.1$, then $\log_a 2.1=3.$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 5 - Exponential and Logarithmic Functions - 5.4 Logarithmic Functions - 5.4 Assess Your Understanding - Page 294: 14
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