Answer
$=-1$
Work Step by Step
$0.1$ is also equal to $\frac{1}{10}$, implying that $0.1=10^{-1}$. Therefore, $\log 0.1 = \log 10^{-1}=-1$. (Since $\log 10^a=a$)
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 5 - Logarithmic Functions - 5.1 Logarithms and Their Properties - Exercises and Problems for Section 5.1 - Exercises and Problems - Page 193: 14
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