Answer:
<h2>400</h2>
Step-by-step explanation:

You need a picture to go with it.
Check the picture below.
so, the maximum height is reached at the parabola's vertex, where x = how many seconds it took, y = how hight it went.

Large: 17 Small: 52
Just do 104 divided by 6 and 104 divided by 2.