Answer
a. intensity of earthquakes
b. $M=\displaystyle \log\frac{I}{S}$
Work Step by Step
The Richter scale is described on p.382.
$a.$
The Richter scale measures the intensity of earthquakes
b.
$M=\displaystyle \log\frac{I}{S}$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 4 - Review - Concept Check - Page 388: 17
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