The best and easily understandable definition of compound interest is the interest which is calculated on the initial principal amount (starting deposit amount) and also on the earned interest of previous periods. The interest is always added to the previous principal to make a new principal for current period. The formula for the compound interest is =
Here, P is principal
r = rate at which interest is calculated
n = number of times interest is compounded in a year
t = number of years for which one has to calculate the compound interest.
<span>If the condition means conventional/regular rectangular piece of paper, then it is, probably, rectangle of 8+3+3 = 14 inches wide and 3+10+3+10 = 26 inches long.</span>