The formula ish = final height in feet h0 = the initial height in feet v0 = the initial velocity in ft/sec t = the final time. h = what we are looking for. h0 = 64 ft v0 = 16 ft/sec t = 1/4 sec Answer: 67 feet above the ground [Notice: Since the balloon was going up when the sandbag was released, the sandbag was still going up 1/4 of a second after it was released. It had not started to fall yet.] Edwin