Posted by **Anonymous** on Thursday, October 20, 2011 at 2:29pm.

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.8 multiplied by 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)

M =

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**Anonymous**, Thursday, October 27, 2011 at 11:54am
M=6.8

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**Anonymous**, Sunday, January 22, 2012 at 11:22pm
6.8 is correct! Thank You!

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**Anonymous**, Tuesday, June 12, 2012 at 12:34pm
We all know an answer is worth nothing without an explanation. instead of 5.6 I have 5.8 but I have no clue what you did, so thanks....for nothing

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