Starting 130 feet away, a person on bicycle rides toward a checkpoint and then passes it. the rider is traveling at a constant of 25 feet per second. the distance the bicycle and the checkpoint is given by the equation d=|130-25t|. at what times is the bike 15 feet away from the checkpoint? 4.6sec and 9.2 sec 2.9sec and 5.8 sec 4.6sec and 5.8 sec 2.9sec and 3.3 sec some with correct answer!