http://threeacts.mrmeyer.com/25billionapps/ 

Our math teacher gave us a assignment to figure out when the twenty-five billion app contest would end.  The address above will take you to the web site.

First, you have to find the average per minute which is 34,189. Then you have to find how many downloads you are away from twenty-five billion. After you find the average you divide that by sixty since there is sixty seconds in a minute which is 341,492,345. Then you  divide by twenty-four because there is twenty-four hours. Then you see how many downloads and divide it by the average for a day. Then you take twenty-five billion then you divide that by twenty-four and get about seven.So it would end  March second at six-thirty.