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Algebra
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A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.5 x 10^2 um.  Find this earthquake's magnitude. (round to one decimal point.)

correct number and symbol 

5.5 x 10^2 µm

µm

Nov 10th, 2014

M˅L = log˅10(A) + 3.0*log˅10(D) - 3.38 .... ˅ means sub 
= log˅10(5.5*10^2/1000) + 3.0*log˅10(300) - 3.38 

Nov 10th, 2014

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