An object was launched upward from a platform. The graph shown models the height above ground, , in meters, of the object seconds after it was launched. What was the height of the platform from which the object was launched, and approximately how many seconds after launch did the object hit the ground?
Platform height: 0 meters; Time to hit ground: 4 seconds
Platform height: 10 meters; Time to hit ground: 2 seconds
Platform height: 10 meters; Time to hit ground: 4.5 seconds
Platform height: 28 meters; Time to hit ground: 4.5 seconds
