Hello guest, welcome to Web.2.0 =)
This would be the formula for finding compound interest.
P would equal how much you borrow or deposit.
r would equal a decimal of your rate of interest
t would equal how many years your borrowed or deposited value has been in/out for
n would equal how many times the interest was compunded in a year
A would equal the ammount of money and interest owed/accumulated in n years
Sorry this is late '=)