The Richter scale is used to measure the magnitude of an earthquake. The magnitude, R, is given by the equation R = 0.65log(0.39 €) +1.45, where Eis the
energy (measured in kilowatt-hours) released by the earthquake. Determine the
amount of energy released by an earthquake of magnitude 7.5.
Rewrite the equation for the magnitude of an earthquake, using the
magnitude of 7.5 given in the problem.