The mean of the commute time to work for a resident of a certain city is 27.3 minutes. Assume that the standard deviation of the commute time is. 7.1 minutes what minimum percentage of commuters in...

The mean of the commute time to work for a resident of a certain city is 27.3 minutes. Assume that the standard deviation of the commute time is. 7.1 minutes what minimum percentage of commuters in the city has a commute time within 2 standard deviations of the​ mean?