Answer
$I=10^{-5}$ W/m$^2$
Work Step by Step
We know that $B=10\log\frac{I}{I_0}$
Hence, here we have
$\log I=\frac{B}{10}-12=\frac{70}{10}-12=7-12=-5$
Thus, the intensity is:
$I=10^{-5}$ W/m$^2$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 4, Exponential and Logarithmic Functions - Section 4.7 - Logarithmic Scales - 4.7 Exercises - Page 422: 17
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
