Answer
$80$
Work Step by Step
$L(I)=10\log\frac{I}{I_0}$ where $I_0=10^{−12}$.
Hence here $L(I)=10\log\frac{10^{-4}}{10^{−12}}=10\log{10^8}=0\cdot8=80$
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 - 7.5 Apply Properties of Logarithms - 7.5 Exercises - Quiz for Lessons 7.4-7.5 - Page 513: 20
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