Question 1202228
The function h = -0.001d? + 0.4d + 3, models the height h feet, of Joe's ball as a function of the stance travelled, d feet, from home plate
a. How high above the ground did Joe make contact with the ball?
b.
What was the height of the ball as it sailed over the wall 325 feet from home plate?
c. What was the height of the ball when it began to fall back to the ground?

First there is a typo in the function h = -0.001d? + 0.4d + 3, what is ?

Since it is an object  having projectile motion it  may  be
h = -0.001d^2 + 0.4d + 3.  Let me take this function and work out

h = -0.001d^2 + 0.4d + 3

The term 3 (ft)shows the height at which contact was made with the ball.

What was the height of the ball as it sailed over the wall 325 feet

 plug  d = 325 in the function

h= -0.001*(325)^2+(0.4)*325 +3

h= 27.375 ft

In the equation ax^2+bx+c=0 x = -b/2a
a=-0.001 b= 0.4plug in 
x value = 200 

Plug x =200 in the function to get height when it started falling

use calculator
 *[illustration ball.png].