A ball is dropped from the top of a 550 ft. building. The function h\left( t \right) = - 16{t^2} + 550 models the height of the ball, h(t) (in feet), at any given time, t (in seconds).

How long does it take the ball to reach the ground? Round your answer to the nearest hundredth of a second.

Question

A ball is dropped from the top of a 550 ft. building.  The function h\left( t \right) = - 16{t^2} + 550 models the height of the ball, h(t) (in feet), at any given time, t (in seconds).

How long does it take the ball to reach the ground?  Round your answer to the nearest hundredth of a second.

anonymous · Answer

You would want to find the x intercept

anonymous · Answer

the value of x at which y=0

anonymous · Answer

And either round up or down the answer accordingly

anonymous · Answer

Always use  a graphing calculator to see where the line intersects x incercept.

anonymous · Answer

ok