Question

A stone is thrown from a 45.1 m cliff with a speed of 5.71 m/s at an angle of 49.5 ¡ to the horizontal. (a) What maximum height above the release point does the stone reach?

Answer 1

there's a nice article on wikipedia for trajectory, which gives the formula you will need. Just recall that the vertex of a parabola occurs when x = -b/2a.