The Richter scale converts seismographic readings into numbers for measuring the magnitude of an earthquake according to this function M(x) = log 
, where xo = 10-3.What is the magnitude of an earthquake whose seismographic reading is 7.6 millimeters at a distance of 100 kilometers from its epicenter?
A. 3.8808
B. 0.20281
C. 2.0281
D. 0.38808
Answer: A
Mathematics
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