The metropolitian airport commission is considering the establishment of limitat

The metropolitian airport commission is considering the establishment of limitations on the extent of noise pollution. The jet noise level per takeoff is normally distributed with a mean of 100 decibels and a standard deviation of 6 decibels.a. what is the probability that a randomly selected jet will generate a noise level greater that 108 decibles b. what is the probability that a randomly selected jet will generate a noise level of exactly 100 decibles c. suppose a regulation is passed requiring jet noise in this neighborhood to be lower than 105 decibles 95% of the time. Assuming standard deviation remains the same how much will the mean noise level have to be lowered to comply with new regulation.