The Richter scale used in measuring the magnitude of an earthquake is a logarithmic scale (having base 10). An increase in magnitude by 1 point means an increase in intensity by a factor of 10. That is, an earthquake having magnitude 2 is ten times as strong as an earthquake having magnitude 1, an earthquake having magnitude 3 is ten times as strong as an earthquake having magnitude 2, and so forth. This can be represented using the equationlog(I1I2)=M1M2,log( I 2 I 1 )=M 1 M 2 ,where I1I 1 and I2I 2 are the intensities of two earthquakes and M1M 1 and M2M 2 are the respective magnitudes of the respective earthquakes.How many times greater in intensity is an earthquake measuring 8.5 magnitude on the Richter scale than another earthquake measuring 6.7 magnitude on the Richter scale? (a) Give the exact answer and then (b) use a calculator to approximate it.