Question

The Richter scale is used to measure the magnitude of an earthquake. The magnitude, R, is given by the earthquake. Determine the amount of energy released be an earthquake of magnitude of 7.5.
It says simplify so it is written in the form b = log a.

Answer 1

A)$R=0.65log(0.39E)+1.45 7.5=0.65log(0.39E)+1.45$

B)$6.05=0.65log(0.39E) Subtracted 1.45 from~ both~ sides~ of~ equation. 9.31=log(0.39E) Divided each side by 0.65.$

C) $9.31=log(0.39E) 10^(9.31)=0.39E E=5.24*10^9 kilowatt hours$