Answer
$\ln{M}=2.2$
Work Step by Step
We know that:
(1) if $a^x=y$, then $\log_a y=x$; and
(2) $\log_e{x}=\ln{x}$.
Hence if $e^{2.2}=M$, then
\begin{align*}
\log_e{M}=2.2\\
\ln{M}=2.2
\end{align*}
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: 18
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