The Richter Scale Reading for an Earthquake Measures Its Intensity

Multiple Choice

The Richter scale reading for an earthquake measures its intensity (as a multiple of some minimum intensity used for comparison) . The intensity I corresponding to a Richter scale reading R is given by . An earthquake occurred near San Francisco in 1923 that measured 6.9; another earthquake occurred in 1947 that measured 7.75. Calculate the ratio of these intensities (larger to smaller) . Round your answer to six decimal places. ​

A) 0.141254
B) 1.123188
C) 13.279704
D) 7.079458
E) 0.010162