A steel cable zip-line is being built on a flat ground for an A steel cable zip-line is being built on a flat ground for an extreme outdoor competition. The finish platform is 2.3 m off the ground. The starting platform is a horizontal distance of 112.6 m away from the finish platform. The angle of elevation between the finish platform and the starting platform is 19°. To the nearest tenth of a metre, how high off the ground is the starting platform? MathMATH 10C
