Billy drops a water balloon from the roof of his house since the balloon began with with an original velocity of zero how far above ground was the balloon dropped if it took 2.5 seconds to hit the ground

The distance between the roof and the ground where the balloon water was dropped is 30.65 meters. This is computed using the free fall formula which state that the height or distance is equal to the time it takes object to hit the ground times the constant gravity. In this case, 2.5 seconds times 9.807 meter per square second will then give us the 30.65 meter.