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Based on annual driving of 15,000 miles and fuel efficiency of 20 mpg, a car in the United States uses, on average, 730 gallons of
Based on annual driving of 15,000 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 29.12% of cars in the United States use less than 490 gallons of gasoline per year, what is the standard deviation?
Round your answer to 2 decimal places.
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