Aball is thrown from a height of 70 feet with an initial downward velocity of 4/fts. the ball's height h (in feet) after t seconds is given by the following.

h=70-4t-16t^2

how long after the ball is thrown does it hit the ground?

round your answer(s) to the nearest hundredth.
(if there is more than one answer, use the "or" button.)

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

Sam is picking fruit from a basket that contains many different kinds of fruit. which set of events is independent?