What is h = -16a² + 1700 (function)

I got
t = 6.614 -16t^2 +1700 = 1000 -16t^2 = -700 t^2 = 43.75
You need to divide by 16 first, before you take the square root.
Domain = what values of time would be used here? t > 0, since negative time not reasonable. And you probably need to find when the ball hits the ground, since after that time, the ball would be underground.
So the a reasonable domain is from 0 to 10.3078
Range: what values of height seem reasonable? h > 0, because negative height would mean that the ball was underground. And ... since the ball was "dropped" from a height of 1700 (vs being "thrown up" from a height) the maximum height would be 1700. So ... a reasonable range would be from 0 to 1700.

Hope this helps... :)

C. i possibility the answer to this