the maximum height is the y-value of the vertex.
h(x) = -2x² + 20x + 48
<em> a=-2, b=20, c=48</em>

h(5) = -2(5)² + 20(5) + 48
= -50 + 100 + 48
= 50 + 48
= 98
Answer: 98 meters
It would be 82 2/3 since 1/3 minis 2/3 would equal -1/3 you subtract that from 83 and get 82 2/3
Answer:
3
*if you ever need to do more math like this, I suggest using desmos :)
f(x) cannot be 0 or less than zero, but can approach+ infinity
Answer is (0, ∞)
b...............................................................................