State quakes: The largest recorded earthquake centered in Idaho measured 7.2 on the Richter scale. a. The largest recorded earthquake centered in Montana was 3.16 times as powerful as the Idaho...

State quakes: The largest recorded earthquake centered in Idaho measured 7.2 on the Richter scale.

a. The largest recorded earthquake centered in Montana was 3.16 times as powerful as the Idaho earthquake. What was the Richter scale reading for the Montana earthquake?

b. The largest recorded earthquake centered inArizona measured 5.6 on the Richter scale. How did the power of the Idaho quake compare with that of the Arizona quake?