Algebra 2 (1st Edition)

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 - Skill Practice - Page 511: 63



Work Step by Step

$L(I)=10\log{\frac{I}{I_0}}$ where $I_0=10^{-12}$ Hence here $L(I)=10\log{\frac{10^3}{10^{-12}}}=10\log10^{15}=10\cdot15=150$
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