we know that We can use pace to describe time and distance We measure pace in units such as hours per mile or seconds per meter
in this problem Michelle ran 3,484 meters at a constant speed over 13 minutes 13 minutes--------> 13*60-----> 780 sec so Michelle's pace=780/3484----> 0.22 seconds per meter
the answer is Michelle's pace is 0.22 seconds per meter
