- Which of the following are rational numbers? Check all that are true. O 0.7
13
18
0 2.3-4
O 270+ 5
52
0 V5

Acircle has a circumference of 28.36 units what is the diameter of the circle

What is the radical expression that is equivalent to the expression 27 1 over 5?

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.