Noemi wrote this expression to describe the number of homework problems she has left to do. 30 – h which situation could be described by this expression? a. noemi knows she has 30 homework problems. she does not know how many she has completed. b. noemi knows she has completed 30 homework problems. she does not know how many she has left. c. noemi knows she has completed 30 homework problems. she doesn't know how many she was assigned. d. noemi knows she has 30 homework problems. she knows she has twice as many left.

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.

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.

How do i simply this radical expression?