1. The problem statement, all variables and given/known data An enemy ship is on the western side of a mountain island. The enemy ship can maneuver to within 2500 m of the 1800 m high mountain peak and can shoot projectiles with an initial speed of 250m/s. If the eastern shore line is horizontally 300m from the peak, what are the distances from the eastern shore at which a shop can be safe from the bombardment of the enemy ship? 2. Relevant equations 3. The attempt at a solution I got what ranges you could be farther away than or x>3577.55, but I can't find a way to get the x< part. I have y=Tanθx-gx²/(125000Cos²θ). And I made an inequality where y>1800. I don't think this is the right approach though. Also I am not sure if the ship can move back or not. If it can't please tell me and then I would know how to do this.