The value of the function at h(-8) is -18.
Evaluation of quadratic equation.
The evaluation of the quadratic equation involves the substitution of -8 for all values of 't" in the quadratic equation. This method helps us to know how function of quadratic equation performs at specific points.
In the given information, we have:

replace t with (-8), to solve for the function when t = -8


h(-8) = -2(9)
h(-8) = -18
Therefore, the value of the function at h(-8) is -18.