Solve the problem.The magnitude of an earthquake, measured on the Richter scale, is given by 
where I is the amplitude registered on a seismograph located 100 km from the epicenter of the earthquake, and I0 is the amplitude of a certain small size earthquake. Find the Richter scale rating of an earthquake with an amplitude of 105.4 I0.
A. 5.4
B. 4.6
C. 12.4
D. 15.4
Answer: A
Mathematics
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B. 
C. 
D. 
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