Question1: Suppose that the mean hourly cost to operate a commercial airplane follows the normal distribution with a mean of $2,275 per hour and a standard deviation of $215.

Calculate the operating cost for the lowest 6% of the airplanes? (Round z value to 2 decimal places. Omit the "$" sign in your response.)

Question2: America West Airlines reports the flight time from Los Angeles International Airport to Las Vegas is 1 hour and 2 minutes, or 62 minutes. Suppose the actual flying time is uniformly distributed between 62 and 77 minutes.

[A] The variance of the flight times is ... (Give your answer to four decimal places.)

[B] The probability the flight time is less than 71 minutes is ... (Give your answer to four decimal places.)

[D] The probability the flight takes more than 68 minutes is ... (Give your answer to 4 decimal places.)

[E] The mean flight time is ... (Give your answer to 1 decimal place.)