Answer
$\ln10+3\ln x+\ln y$
Work Step by Step
We know that $x\log_ab=\log_ab^x$ and that $\log_ab+\log_ac=\log_a(bc)$
Hence here $\ln (10x^3y)=\ln10+\ln x^3+\ln y=\ln10+3\ln x+\ln y$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 7 Exponential and Logarithmic Functions - Chapter Review - Page 541: 26
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