Question

a human heart beats an average of 2,956,575,000 times in 75 years. about how many times does a heart beat in one year? in one day? in one minute?

Answer 1

A. According to the information given in the exercise, the human heart beats an average of 2,956,575,000 times in 75 years. In order to find how many times the human heart beats per year, you can solve the following division:

`y=(2,956,575,000)/(75)=39,421,000`

Where "y" is number of times the human heart beats per year.

B. There are 365 days in 1 year.

Let be "d" the number of times the human heart beats in one day.

Divide the value of "y" by 365 in order to find the value of "d":

`\begin{gathered} d=(y)/(365) \\ \\ d=(39,421,000)/(365) \\ \\ d=108,002.74\approx108,003 \end{gathered}`

C. Let be "m" the number of times the human heart beat in one minute.

You know that there 60 minutes in 1 hour, and 1 day has 24 hours. Therefore, the amount of minutes in 24 hours is:

`(24h)((60\min)/(1h))=1,440\min`

Now divide "d" by 1,440 minutes in order to find the value of "m". This is:

`\begin{gathered} m=(d)/(1,440) \\ \\ m=(108,003)/(1,440) \\ \\ m=75 \end{gathered}`

The answers are:

A. 39,421,000 times per year.

B. 108,003 times per day.

C. 75 times per minute.