Question

Will award medal!!! Starting from 105 feet away, a person on a bicycle rides toward a check point and then passes it. The rider is traveling at a constant rate of 35 feet per second. The distance between the bicycle and the checkpoint is given by the equation d=|105-35t|. At what times is the bike 60 feet away from the checkpoint? A. 1.3 sec and 2.6 sec B. 1.3 sec and 4.7 sec C. 1.1 sec and 2.6 D. 4.7 secs and 9.4 secs. Please help! I have been trying to figure it out but have not had any luck!