To find the height of a pol0, a surveyor moves 140 feet away from the base of the pol0 and then, looking through an instrument that is 4 feet tall, measures the angle of elevation to the top of the pole to be 44 degress To the nearest foot, what is the height of the pol0 from the ground? a: 135 ft
b: 149 ft
c: 145 ft
d: 139 ft

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.