Question

An arrow is shot upward with a velocity of 64 feet per second. Using the formula h(t)=64t-16t^2

Answer 1

Answer:

$t = 4$ : Arrow hits the ground after 4 seconds.

Step-by-step explanation:

I assume you are going to ask when the arrow hits the ground, right? If so, follow these steps!

$64t-16t^2=0$

We can factor/distribute to solve this...

$16t(4-t)=0$

If this is true, then that means that...

$16t=0$ $or$ $4-t=0$

$t=0$ $or$ $-t=-4$

So the solution would be

$t = 0$ $or$ $t=4$

In this case, we want to use 4.