- Please help this is a Rational Inequality problem

1. A ball is thrown straight up from the top of a tower that is 280 ft high with an initial velocity of 48 ft/s. The height of the object can be modeled by the equation s(t) = -16t2 + 48t + 280.

2. In two or more complete sentences explain how to determine the time(s) the ball is lower than the building in interval notation.