book Maths Puzzle Numerical Ability

2.A reflecting telescope has a parabolic mirror for which the distance from the vertex to the focus is 35feet. if the distance across the top of the mirror is 54 inces, how deep is

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A person standing close to the edge on the top of a 200-foot building throws a baseball upward into the air. The quadratic function models the ball’s height above the ground in f 3e^x - 1 = 6