Answer :
Final Answer:
The answer in scientific notation :
A human heart beats at an average of [tex]\(4.8 \times 10^4\)[/tex] beats per hour,[tex]\(1.15 \times 10^6\)[/tex] beats per day, [tex]\(4.2 \times 10^8\)[/tex] beats per year, and [tex]\(4.2 \times 10^{10}\)[/tex] beats in 100 years.
Explanation:
The average human heart rate is 80 beats per minute. To calculate how many times the heart beats in different time periods, we need to convert the minutes to the desired unit (hour, day, year, 100 years) while considering the number of minutes in each unit.
1. In an hour:
There are 60 minutes in an hour, so the heart beats[tex]\(80 \times 60 = 4800\)[/tex] times in an hour. In scientific notation, this is [tex]\(4.8 \times 10^4\)[/tex] beats per hour.
2. In a day:
There are 24 hours in a day, so the heart beats [tex]\(4800 \times 24 = 115200\)[/tex] times in a day. In scientific notation, this is [tex]\(1.15 \times 10^6\)[/tex] beats per day.
3. In a year:
On average, there are 365.25 days in a year (accounting for leap years), so the heart beats[tex]\(1.15 \times 10^6 \times 365.25 \approx[/tex] [tex]4.2 \times 10^8\)[/tex]times in a year.
4. In 100 years:
Multiply the yearly beats by 100: [tex]\(4.2 \times 10^8 \times 100 = 4.2 \times 10^{10}\)[/tex]beats in 100 years.
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