Final answer:
To measure apical heart rate before giving meds, count the beats for 15 seconds and multiply by 4 to get the heart rate per minute.
Step-by-step explanation:
In order to measure apical heart rate before giving meds, you should count the beats for 15 seconds and then multiply that number by 4 to get the heart rate per minute.
For example, if you count 20 beats in 15 seconds, you would multiply 20 by 4 to get a heart rate of 80 beats per minute.
So the correct answer is c. Count for 15 seconds and multiply by 4.