Answer:
[tex]h(6)=288\ m[/tex]
Step-by-step explanation:
we have
[tex]h(x)=-x^{2}+54x[/tex]
This is a vertical parabola open downward
The vertex represent a maximum
we know that
h(6) means, the value of the function h(x) when the value of x is equal to 6
so
For x=6
substitute in the quadratic equation and solve for h(x)
[tex]h(6)=-(6)^{2}+54(6)[/tex]
[tex]h(6)=288\ m[/tex]