Using Matlab:

the interest, i, on a principle, p0 is payment for allowing the bank to use your money.

compound intrest is accumlated according to the furmula Pn=(1+i)Pn-1,where n is the comounding period, usually in months or years. Write function with header [years]=mysavingplan(p0, i , goal) where years is the number of years it will take p0 to become goal i% interest compounded annually.