Suppose the total cost in dollars to producer items is given by the function
C(x)=0.0001r +0.04r? +17x+3500
A. Find the average rate of change of the
total cost when the number of items
produced increases from 100 to 200
items.
B. Find the average rate of change of the
total cost when the number of items
produced increases from 200 to 400
items.
Answer A:
Answer B:

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.