The mighty oak tree outside of Matt's house had to be cut down. He missed the beautiful tree and the shade it provided, and wanted to replace it with an oak tree that would grow quickly. The Nuttall Oak (quercus nuttallii), the fastest growing oak tree, grows 777 to 888 feet per year (we'll assume it grows at a constant rate). At maturity, it can be up to 505050 feet tall. Which of the following equations, where ttt represents time in years and hhh represents height in feet, describe growth that is slower than the Nuttall Oak growth rate?

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.