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On a typical weekday afternoon the travel time from GW to Dulles airport follows a normal distribution with a mean of 45 minutes and standard...
On a typical weekday afternoon the travel time from GW to Dulles airport follows a normal distribution with a mean of 45 minutes and standard deviation of 4 minutes. Find the value X0 such that the probability that it takes less than X0 minutes to get from GW to Dulles is 0.99?