Question

Steven's heart rate is 75 beats per minute. If this is his average heart rate, what is the last thing you will multiply by to find out how many times it will beat in 10 years?

Answer 1

It depends on the syntax of the expression.

Explanation:

There are many ways to write this unit conversion (dimensional analysis).

Here's one way:

`\frac{75 \, \textrm{beats}}{1 \, \textrm{min}} * \frac{60 \, \textrm{min}}{1 \, \textrm{hr}} * \frac{24 \, \textrm{hr}}{1 \, \textrm{day}} * \frac{365 \, \textrm{days}}{1 \, \textrm{year}} * 10`

And here's another:

`10 * \frac{75 \, \textrm{beats}}{1 \, \textrm{min}} * \frac{75 \, \textrm{min}}{1.25 \, \textrm{hr}} * \frac{8,760 \, \textrm{hr}}{1 \, \textrm{year}} * ((4)/(5))/((4)/(5))`

But the expected answer is probably:

`10`