Jenny is painting a toy chest that she made for her little brother. if the box is 4 feet long, 3 feet wide, and 2 feel tall, what is the surface area of the box to be painted? okay so i think i have it figured out, would the surface area be 42? ?

How far is x from 5 on a number line?

Which number completes the inequality? 2/3 < _ < 7/9

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.