The magnitude, m, of an earthquake is defined to be m=log i/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth. a) 2 b)3 c)4.5 d)6.9