List the Properties of quadrilateral a(0,-2) b(9,1) c(4,6) d(1,5). And classify the figure by its most percise name.

We  have to find te vertex of this parabola.
Given a square function:
F(x)=ax²+bx+c
The vertex of this parabola will be the point (-b/2a, f(-b/2a)

In this case:
h(t)=-16t²+576t
a=-16
b=576
-b/2a=-576/-32=18
h(18)=-16(18)²+576(18)=-5184+10368=5184
The vertex will be: (18, 5184)

Because a is negative we have a maximum, if a were positive we have a minimum.
Then we have a minimum at t=18 s; and the maximum heigth would be 5184 m

The projectile take to reach its maximum heigth in 18 s, and the maximum height would be 5184 m.