the boat traveled up the river at 15 mi./hr. to reach their campsite 90 miles up the river, the rogers traveled twice as long in the afternoon as they did in the morning. how long did they travel in the morning?

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.

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost

A(1,1) b(-3,0) c(-4,-1) d(3,-2) drag it to correct position