Question 813382
a) At its maximum or vertex. t=4.08163
b)  83.6327
c) It is the vertex- the highest point
vertex | (4.08163, 83.6327)
d) x = 8.21296
e) when y=0 ;when the parabola cross the x axis
set h(t)=0 and solve for x
f)when the parabola cross the x axis
g) set h(t)=0 and solve for x