http://www.moneychimp.com/articles/finworks/fmfutval.htm
The formula is here.
If $635 is invested in an account that earns 9.25%, compounded annually, what will the account balance be after 21 years?
2 answers
amount = 635(1.0925)^21 = .....
you do the button-pushing.
you do the button-pushing.