On April 11, 2012, two earthquakes were measured off the northwest coast of Sumatra. The first had a magnitude of 8.6. The second had a magnitude of 8.2. By what approximate factor was the intensity of the first earthquake greater than the intensity of the second earthquake? 0.40 1.02 1.05 2.51
In order to know that, you just need to calculate their difference 8.6 - 8.2 = 0.40 So, option A is your answer. Hope this helps!