(a) A quake measuring 8.5 on the Richter scale would be severe. Express the intensity of such a quake in exponential form and in radical form. Exponential form I= Radical form I= (b) Find the intensity of a quake measuring 9. I =  (c) The San Francisco quake that occurred during the 1989 World Series measured 6.9, and the March 2011 quake that devastated Sendai, Japan, measured 9.0. Calculate the ratio of these intensities (larger to smaller). (Round your answer to three decimal places.)

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter4: Exponential And Logarithmic Functions
Section4.2: The Natural Exponential Function
Problem 38E
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The Richter scale reading for an earthquake measures its intensity (as a multiple of some minimum intensity used for comparison). The intensity I corresponding to a Richter scale reading R is given by

I = 10R.
(a) A quake measuring 8.5 on the Richter scale would be severe. Express the intensity of such a quake in exponential form and in radical form.
Exponential form I=
Radical form I=


(b) Find the intensity of a quake measuring 9.
I = 


(c) The San Francisco quake that occurred during the 1989 World Series measured 6.9, and the March 2011 quake that devastated Sendai, Japan, measured 9.0. Calculate the ratio of these intensities (larger to smaller). (Round your answer to three decimal places.)
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