Find the exponential model y = aebx that fits the points shown in the graph. (Round your value for b to four decimal places.) y = y 6 (4,5) 4 2 (0, 1/5) 1 2 3 4 5 6 X Use the Richter scale R = 10910 (+) for measuring the magnitudes of earthquakes. Find the magnitudes R of the following earthquakes of intensity I (let Io = 1). (Round your answers to two decimal places.) (a) = 42,326,000 R = (b) R = I= 16,079,000 (c) R= I = 246,300