A billionaire offers to give you $2.9 billion if you will count out the amount in $1 bills or a lump sum of $5000. assume that you can count at an average rate of one bill per second, and be sure to allow for the fact that you need about 10 hours a day for sleeping and eating. which offer should you accept? in order to answer this, how long will it take you to count out the $2.9 billion? answer in units of y.

Since it is a dollar a second we will need. 2.9 billion seconds. To get a better handle on this how many minutes is it? then hours. Then days and so on.

If it were 100 we would divide it by 60 to get 1 and 2/3 minutes, so just keep dividing by the next highest unit of time. This is a good showing of unit conversion. So 60 minutes in an hour, then 14 hours per day, since 10 will be for sleeping, and so on. you could also find the final conversion and just apply them all at once, so 60 seconds per minute, 3600 seconds per hour, 50400 useable seconds per day and you can go as high as you want