A= -81 + square root of 113
a<span>≈</span> -70.36985418
<h2>
Explanation:</h2>
In this problem we have a pumpkin is launched from the top of a 20 foot tall platform at an initial velocity of 84 feet per second. So the height, h, of the pumpkin at time t seconds after the launch can be modeled by the equation:

So this is the equation of a parabola. The maximum of this parabola occurs at its vertex. So let's find this vertex:

Finally, the maximum occurs at time 2.625 seconds when the height is 130.25m
Answer:
Thanks for asking!
Step-by-step explanation:
The answer is -x²+9+12
Answer:
Step-by-step explanation:
not sure sorry ask a parent