cuzhernamesari
cuzhernamesari
14.04.2020 • 
Mathematics

Based on annual driving of 14,600 miles and fuel efficiency of 20 mpg, a car in the United States uses, on average, 730 gallons of gasoline per year. If annual automobile fuel usage is normally distributed, and if 21.77% of cars in the United States use less than 480 gallons of gasoline per year, what is the standard deviation?

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