Aball is thrown in the air from a ledge. its height in feet is represented by f16(2-5x - 6), where x is the number of seconds since the ball has been thrown. the height of the ball is 0 feet when it hits the ground. how many şeconds does it take the ball to reach the ground?

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6

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.