A horizontal bridge is in the shape of a parabolic arch. Given the information below, what is the height h of the arch 2 feet from shore?
*width across bridge (from one side of the parabola to the other side of the parabola) is 20 feet
*The height of the arch (the vertex of the parabola under the bridge to the water below) is 10 feet
*the height h we want is located under the bridge itself 2 feet from the shore