The Richter scale is used to measure the magnitude of a earthquake. The magnitude, R, is given by the equaiton R=0.65log(0.39E)+1.45, where E is the energy (measured in kilowat hours)released by the earthquake. Determine the amount of energy released by an earthquake of magnitdude 7.5

USE THESE STEPS TO SOLVE:

a. Rewrite equation for magnitude of earthquake, using magnitude of 7.5 given in problem.

b. Simplify so it is writen in form b=loga

c.solve problem for E, the energy released in earthquake.