Tanya bought a new car. She made an initial payment of $2,000, and she will
pay $187 each month until the car is
paid off.
Which equation represents the
relationship between x, the number of
monthly payments Tanya has made,
and y, the total amount that Tanya has
paid towards the cost of the car?

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.