The average human heart beats 1.15*10^5 times per day. There are 3.65*10^2 days in one year.
How many times does the heart beat in one year?
Write your answer in scientific notation, and round to one decimal place.
To find the total number of beats in one year, we need to multiply the average number of beats per day by the number of days in one year:
(1.15*10^5 beats/day) * (3.65*10^2 days/year) = 4.1975*10^7 beats/year
Rounding to one decimal place, the heart beats 4.2*10^7 times in one year.