http://threeacts.mrmeyer.com/25billionapps/act2/timer.pdf
My math teacher gave the class an assignment to come up with an explanation to find out the time and date of the 25 billionth downloaded in the app store. The fist thing that you would do is go to the link at the top of my post and look at the screenshots of the apps downloaded per minute. Then you need to find what to subtract from 25 billion. You would subtract 25 billion by 24,658,610,221 you should get 341,389,779. Now that you have 341,389,779 you divide that number by 33,800 when you divide those numbers you will get 10,100 this number represents the number of minutes it will take to get to 25,000,000,000. Now you need to know how many hours it takes to get to 25,000,000,000 you would divide 10,100 by 60 then you should get 168. Then you divide 168 by 24 to get the days you should get 7 days which is Monday March 2 at 6:30.