If the heart beats at an average rate of 72 bpm, how many heartbeats occur in one day?

To determine the number of heartbeats that occur in one day when the heart beats at an average rate of 72 beats per minute (bpm), you can use the following calculations:

First, calculate the number of beats in one hour. Since there are 60 minutes in an hour, you multiply the rate of 72 bpm by 60 minutes:

72 beats/minute × 60 minutes/hour = 4320 beats/hour.

Next, to find the total number of beats in one day, you need to consider the number of hours in a day, which is 24. Multiply the number of beats in one hour by 24:

4320 beats/hour × 24 hours/day = 103680 beats/day.

This calculation shows that at a rate of 72 bpm, the heart would indeed beat 103680 times in a 24-hour period, making that the correct answer.