Answer
$-0.1063$
Work Step by Step
Apply the Change of base property: $\displaystyle \quad \log_{b}M=\frac{\log_{a}M}{\log_{a}b}$
$\displaystyle \log_{4}0.863=\frac{\log 0.863}{\log 4}\quad $... use a calculator
$\approx-0.1063$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 3 - Review Exercises - Page 513: 59
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