The arctic tern is an amazing bird that migrates 22,000 miles from the north pole to the south pole every september (and back home every april). at dawn on a certain september day, one bird is flying due south past lisbon, portugal, a distance of 3,124 miles from his arctic home. he is flying at a constant velocity of 17 miles per hour. how far, in miles, will he be from home at sunset, exactly 12 hours later?

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.