The apple store had a contest to give who ever had the 25 billionth app 10 thousand dollar gift card.  My goal was to find out when to start downloading apps to try to win the prize.  http://threeacts.mrmeyer.com/25billionapps/ . To start off I found out how many downloads there are per minute. I did that by taking 6:27, 6:28, 6:29 and 6:30.  I took their number of downloads and I subtracted 6:28 from 6:27. I subtracted 6:29 from 6:28 and I subtracted 6:30 from 6:29.  I took  the three numbers I got and I added them up and divided them by 3.  That gave me 34211 which is one minuet. I took the one minuet number and I multiplied it by 60 and got 2052660 which is one hour. I took the one hour and I multiplied it by 24 and i got 49215840 which is one day. Then I took the number of downloads from 6:27 and I subtracted it from 25 billion and I got 341492345. I took that number and I divided it by the downloads in a day. That gave me 6.9 and that’s the number of days till the contest is over. That means the contest will be over march 2nd at 9:00 pm.