Jenna wants to buy a new tablet that costs $242. She already has $62 and plans to save $12 per week. If w represents the number of weeks until Jenna has enough money to buy the tablet, write an equation that can be used to find the value of w.​

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.