Major Physics Problem for Gurus Only!!!

<p>if a spring is hooked to a height that is known (h) and it must be launched a certain distance away, also known (d)
if the spring constant is given(k)
and the change in height is given (c)
at wat angle and how far must i stretch the spring to launch that spring to get it to that distance?
g=-9.81
air resistance is negligible</p>