Tammy is choosing between two exercise routines. in routine #1, she burns 20 calories walking. she then runs at a rate that burns 18.5 calories per minute. in routine #2, she burns 37 calories walking. she then runs at a rate that burns 14.25 calories per minute. for what amount of time spent running will routine #1 burn fewer than routine #2? use t for the number of minutes spent running. show your work