Tran measured his pulse and found that his heart beat 80 times in one minute under normal conditions. at this rate, how many days will it take tran's heart to beat 1 million times?

Okay, today is ratio/unit conversion day it seems like for .

You can solve this by looking at:

80beats/1min = 1,000,000/x

Then, use cross multiplication to get x.  This will be in minutes!  You will need to convert this to hours and then to days to arrive at the answer.

I hope this helps!

Edit: 8.68 days!  Also the amount of days I have until I can see my kids for a few hours!