Question

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

Answer 1

Answer:
`4.2\cdot10^(7)` times

Explanation:

Given: The average human heart beats in one day=
`1.15\cdot10^5` times

The number of days in one year =
`3.65\cdot10^2`

Now, the number of times does the heart beat in one year is given by :-

`1.15\cdot10^5\cdot3.65\cdot10^2\\\\=1.15*3.65*10^(5+2)......[\text{Since }a^m\cdot a^n=a^(m+n)]\\\\=4.1975\cdot10^(7)\approx4.2*10^7`

Hence, the heart beat
`4.2\cdot10^(7)` times in one year.