I am not sure what more context you need.

The height (in it) of a flare shot upward from the ground is given by s = 124.8t - 16.0t2, where t is the time (in s). What is the greatest height to which the flare goes? . . .. . Find the derivative of the function to be maximized. ds dt The greatest height to which the flare goes is (Type an integer or a decimal.)