juberlinpuentes23
contestada

Whitney kicks a football off the ground. The height, h, in feet, of the football above the ground after t
seconds is given by h(t) = -8t2 + 32t. How many seconds after the football is kicked does it hit the
ground for the first time? Write your answer in the box.

Respuesta :

mindyyyy

Answer:

t=4

Step-by-step explanation:

Answer:

t=4s

Step-by-step explanation:

I'll assume the you mean $h(t)=-8t^2 + 32t$.  So we want the height to be zero so $h(t)=0$.  Set up the equation:

$0=-8t^2 + 32t$.  

Let's Solve:

$0=-8t^2 + 32t$

$0=-8t(t-4)$

$0=t-4$

$t=4$

So that means that t=4 seconds