Answer:
Caiden's heart will beat about 2,592,000 times in 40 years if his heart rate is 70 beats per minute.
Explanation:
To find this, first multiply the number of minutes in 40 years by the number of beats per minute to find the total number of beats: 40 years * 365 days/year * 24 hours/day * 60 minutes/hour * 70 beats/minute = 2,592,000 beats. This is a rough estimate, since the number of days in a year and the number of hours in a day can vary slightly. However, it gives a good approximation of the number of beats Caiden's heart will make in 40 years.