Question

a typical person has an average heart beat rate of 69.0 beats per minute. How many beats does she have in 3.0 years?

Answer 1

First find the total number of minutes in three years.

Using dimensional analysis you get 1576800 minutes in three years.
(60 mins * 24 hrs * 365 days * 3 years)

Then just multiply that number to figure out how many beats an average person has in three years.

108799200 beats in three years.

Answer 2

\[\frac{69 beats}{min}*\frac{60 min}{1hr}*\frac{24 hr}{1day}*\frac{3(360)day}{3(1)year}\]
\[=\frac{35769600beats}{3years}\]