Question

If the heart of an elephant at rest will beat an average 1380 beats in 60 min, what is the rate in beats per minute?

Answer 1

See a solution process below:

Explanation:

We can use this ratio equation to find the solution to the problem:

`b/(1"min") = (1380"beats")/(60"min")`

`color(red)("min") xx b/(1"min") = color(red)("min") xx (1380"beats")/(60"min")`

`cancel(color(red)("min")) xx b/(1color(red)(cancel(color(black)("min")))) = cancel(color(red)("min")) xx (1380"beats")/(60color(red)(cancel(color(black)("min"))))`

`b/1 = (1380"beats")/60`

`b = ((60 * 23)"beats")/60`

`b = ((color(red)(cancel(color(black)(60))) * 23)"beats")/color(red)(cancel(color(black)(60)))`

`b = 23` beats