A ball is thrown from an initial height of 4 feet with an initial upward velocity of 38 ft/s. The ball's height h (in feet) after t seconds is given by the following. h=4+381-167 Find all values of t for which the ball's height is 18 feet. Round your answer(s) to the nearest hundredth. (If there is more than one answer, use the "or" button.)​

You can find the constant of proportionality by finding the ratio of

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.

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x