An object was launched from the top of a hill with an upward vertical velocity of 100 feet per second. The height of the object can be modeled by the function h(t)=-16 t^2+100 t+300, where t represents the number of seconds after the launch. Assume the object landed on the ground at sea level. Find the answer using graphing technology,
The object's height was } \quad \text { when it was launched.