data collected at an airport suggests that an exponential distribution with mean value 2.675 hours is a good model for rainfall duration. (a) what is the probability that the duration of a particular rainfall event at this location is at least 2 hours? at most 3 hours? between 2 and 3 hours? (round your answers to four decimal places.) at least 2 hours at most 3 hours between 2 and 3 hours