contestada

If a toy rocket is launched vertically upward from ground level with an initial velocity of 128 feet per second, then its height h after t seconds is given by the equations h(t) = -16t squared + 128t (if air resistance is neglected).

How long is the rocket in the air?

Respuesta :

Answer:

8 seconds

Step-by-step explanation:

Just use the quadratic equation, but remember, use only positive answer(s). Time can't be negative.