Jack needs to rent a car for his vacation. Car rental company A charges customers a one-time rental fee of $100 plus $0.10 for every mile the car is driven. Car rental company B charges customers a one-time rental fee of $50 plus $0.25 for every mile the car is driven. Which inequality can be used to find m, the minimum number of miles that can be driven so that the total charge at Company A is less than the total charge at Company B? A 100+0.10m>50+0.25m

B 100+0.10m 50m+0.25.

D 100m+0.10<50m+0.25

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.