Answer
$-4$
Work Step by Step
Recall:
$\log _{a}a^{n}=n\left( a\neq 1\right)$
Thus,
$\ln e^{-4}=\log _{e}e^{-4}=-4$
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 - 5.5 Properties of Logarithms - 5.5 Assess Your Understanding - Page 305: 15
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