A patient has a heart rate of 90 beats per minute. How many beats occur in one hour?

To determine how many beats occur in one hour at a heart rate of 90 beats per minute, you can perform a simple calculation. There are 60 minutes in an hour. To find the total number of beats in one hour, you multiply the heart rate (90 beats/minute) by the number of minutes in an hour (60 minutes).

The calculation is as follows:

90 beats/minute × 60 minutes = 5400 beats/hour.

This shows that at a heart rate of 90 beats per minute, a patient experiences a total of 5400 beats in one hour. Therefore, the correct calculation leads to the answer of 5400 beats.