Use the given scale factor and the side lengths of the scale drawing to determine the side lengths of the real object.
Scale factor: 5.1
35 in
30 in
15 in
Scale drawing
с
Real object
A. Side a is 30 inches long, side bis 25 inches long, and side cis 10
inches long
B. Side a is 40 inches long, side bis 35 inches long, and side c is 20
inches long
C. Side a is 7 inches long, side bis 6 inches long, and side cis 3
inches long
D. Side a is 175 inches long. side bis 150 inches long, and side cis
75 inches long

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.