The intensity levels I of two earthquakes measured on a seismograph can be compared by the formula   log(I1I2)=M1−M2   using the common (base 10) logarithm and where M is the magnitude given by the Richter Scale. In August 2009, an earthquake of magnitude 6.1 hit Honshu, Japan. In March 2011, that same region experienced yet another, more devastating earthquake, this time with a magnitude of 9.0.[1] How many times greater was the intensity of the 2011 earthquake?   Round to the nearest whole number.   The intensity of the 2011 earthquake was   times greater than the intensity of the 2009 earthquake.

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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The intensity levels I of two earthquakes measured on a seismograph can be compared by the formula

 

log(I1I2)=M1−M2

 

using the common (base 10) logarithm and where M is the magnitude given by the Richter Scale. In August 2009, an earthquake of magnitude 6.1 hit Honshu, Japan. In March 2011, that same region experienced yet another, more devastating earthquake, this time with a magnitude of 9.0.[1] How many times greater was the intensity of the 2011 earthquake?

 

Round to the nearest whole number.

 

The intensity of the 2011 earthquake was   times greater than the intensity of the 2009 earthquake.

 

 

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