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 shoreline is horizontally 300m from the peak, what are the distances from the eastern shore at which a ship can be safe from the bombardment of the enemy ship? I need to find the two angles at which the height of the projectile is 1800m at 2500m from the boad, but I'm having trouble relating all the different equations for Range, max height, and the other kinematic equations for motion in two dimensions. A suggestions would be greatly appreciated.