....... 4. [-/2 Points] DETAILS 0/6 Submissions Used (a) Find the magnitude of an earthquake that has an intensity that is 71.3 (that is, the amplitude of the seismograph reading is 71.3 cm). (Round your answer to one decimal place.) (b) An earthquake was measured to have a magnitude of 5.5 on the Richter scale. Find the intensity of the earthquake. (Round your answer to one decimal place.) Need Help? Read It