If a plane is cruising at an altitude of 30,000
feet wants to land at O'Hare, it must begin
its decent so that the angle of depression to
the airport is 7º. How many miles from the
airport must the plane begin to descend?

Suppose that an airline uses a seat width of 16.516.5 in. assume men have hip breadths that are normally distributed with a mean of 14.414.4 in. and a standard deviation of 0.90.9 in. complete parts (a) through (c) below. (a) find the probability that if an individual man is randomly selected, his hip breadth will be greater than 16.516.5 in. the probability is nothing. (round to four decimal places as needed.)