If a faster turtle travels the same distance in 10 minutes less time, what is the unit rate when the faster turtle's speed is expressed in miles per hour (mph)?

Which function is represented by the graph

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.

For the inequality |c| < |d| to be true, which of the following must be true?