If a worker accidentally drops a bolt from the top of a 1600 foot tall tower, the height of the bolt after t seconds is given by the expression 1600−16t2.
the bolt hits the ground after approximately how many seconds?

The perimiter of a rectangle is 70 inches the legneth of the rectangle is 5 less than 3 times the width of the rectangle what is the width of the rectangle

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

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.