Here is a site my buddie has to help you. Well co-owner..
https://www.quora.com/Why-is-fresly-prepared-FeSO4-required-for-the-ring-test
First step: identify how many heart beats in a year.
To determine the heart beats in a year multiply the heart beats in a minute with
years.
Thus, heart beats in a year comes out to be = 
=
heart beats in a year
Heart beats
in a life time.
Thus, number of years he lives is calculated by the division of heart beats in a year and heart beats in a life time.
Number of years he lives = 
= 
= 
=
years
Thus, number of years he lives is
years
Answer:
#3
Explanation:
not sure but it's close to 5,100