Jennifer is making costumes for the school play she has 70 m of ribbon if she beeds 54 percent of the ribbon for the costumes. how much ribbon does she need will mark brainiest show your work

Which of those sequences is a geometric sequence

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

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.