Have you worked it out yet: 984 876 543 210 x 875 622 375 933 ? Compare methods in the class - have we all used the same method? Now compare your answers, are they all the same?Most people tend to make a mistake at some point in that calculation (maybe you did too?) and two minutes isn"t enough time (for most people) to complete it! Another solution is required.For an explanation of how the Richter scale is calculated,...