Question 868763
"Marit's heart beat 13 times in 10 seconds" so Marit's rate is 13/10 = 1.3 beats per second



"Coleman's heart beat 18 times in 15 seconds" so Coleman's rate is 18/15 = 1.2 beats per second



So Marit's heart rate is faster (by 1.3 - 1.2 = 0.1 beats per second)