Anna opens a new savings account with a $500 deposit. She makes regular deposits of $50 each week. Suppose she makes a one-time withdrawal of $75. Which TWO expressions represent the balance of the savings account after x weeks? A.) x + 425
B.) 50x + 425
C.) 500x - 75
D.) 50(x - 75)
E.) (50x + 500) - 75

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.