Cathy and helen were racing each other from the same point and running in the same direction. the distance that cathy runs(in meters), for every second t, can be given by a(t)=5t. and the distance in meters that helen runs, for every second t can be given by b(t)=4.5t . what is the distance in meters between them after they have raced 150 seconds? give answer to nearest whole number.