Question

A person's heartbeat is 88 beats per minute. If his/her heart beats 3.1e9 times in a lifetime, how long (in whole years) does the person live? Disregard leap years.

Answer 1

I am doiing 88x60=5280
5280x24= 126720/day

Answer 2

First find number of beats per year
88*60*24*365

Answer 3

but 3.1e^9 is only 25119.56

Answer 4

oh that means, 3.1 X 10^9, like scientific notation

Answer 5

yes

Answer 6

then divide
\[years = \frac{3.1 X10^{9}}{88*60*24*365}\]

Answer 7

ok I got the answer of 67

Answer 8

thank you

Answer 9

yes, thats what i get as well :)