Answer
$7.8137$
Work Step by Step
Since $225=9\times25=9\times5^2$, we have $log_b(225)=log_b(9\times5^2)=log_b(9)+log_b(5^2)=log_b(9)+2log_b(5)=3.1699+2(2.3219)=7.8137$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 4 - Inverse, Exponential, and Logarithmic Functions - Quiz - Page 461: 10
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