PRACTICE ANOTHER

A stone is thrown straight up from the roof of a240-ft building. The distance (in feet) of the stone from the ground at any timet(in seconds) is given by

h(t) =16t²+32t+240.

When is the stone rising, and when is it falling? (Note that the stone cannot be rising beforet= 0,and it cannot be falling after it hits the ground. Enter your answers using interval notation.)

Hint:The stone is on the ground whenh(t) = 0.

rising[0,1]falling(1,1)

If the stone were to miss the building, when would it hit the ground?

t=sec