What is the unit rate of 162 heartbeats in 60 seconds?

To find the unit rate of heartbeats, divide the total number of heartbeats by the time in seconds. In this case, 162 heartbeats in 60 seconds gives a unit rate of 2.7 heartbeats per second (162 ÷ 60 = 2.7). This means the heart beats 2.7 times every second.