Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 5 - 5.2 - Logarithmic Functions and Their Graphs - 5.2 Exercises - Page 380: 84a



Work Step by Step

$\beta=10\log\frac{I}{10^{-12}}$ If $I=1$: $\beta=10\log\frac{1}{10^{-12}}$ $\beta=10\log10^{12}$ $\beta=10\times12=120$
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