---

Status: Waiting for your answers.

Problem: Using factoring, determine how long an object stays in the air if its height is defined by these parametric equations. x(t) = 4t y(t) = -16t2 + 400   Work: -16t2 + 400 = 0 -16(t2 - ) = 0 -16(t - )(t + ) = 0 t - = 0   OR   t + = 0 t =   OR   t = Solution: This object will stay in the air for seconds.