Formula to show how much you would save if you started at $10/ day and added $10 more per day to savings for a year.
What I understand that in your first day you will have 10, and in your second day you will have 30 , and in your fourth day you will have 60, and so on. If that is what you meant then,
the formula is 10(n/2)(n+1),where n = the number of days. We can use this formula to see how much you would end up with in a year(365 days), just substitute n with 365 and we will get: 10(365/2)(365+1) = 667950
So you will end up with 667950 at the end of the year.
I hoped I managed to help you.