Fuel economy estimates for automobiles built one year predicted a mean of 27.4 mpg and a standard deviation of 8.31 mpg for highway driving. Assuming the gas mileages for automobiles are normally distributed, use theEmpiricalRuleto answer the following:

• The middle 95% of automobiles can be expected to have gas mileages betweenand.
• Approximately% of automobiles will have a gas mileage more than 10.78 mpg.
• Approximately% of automobiles will have gas mileages between 2.47 and 19.09.
• Which of the statements below describes the gas mileages of the best 2.5% of cars?
• They get more than 52.33 mpg.
• They get less than 2.47 mpg.
• They get more than 44.02 mpg.
• They get less than 10.78 mpg.