Algebra and Trigonometry 10th Edition

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

Chapter 5 - 5.5 - Exponential and Logarithmic Models - 5.5 Exercises - Page 408: 47b

Answer

$ -170$ decibels

Work Step by Step

We have $\beta=10 \log (II_0)$ Plug in the data: Therefore, $\beta=10 \log (10^{-12} \times 10^{-5})= 10 \log 10^{-17}$ Or, $\beta = 10 (-17) \log 10 =-170$ Therefore, the sound level is $\beta = -170$ decibels
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