The formula for compounded interest is A = P (1+r/n)^nt. P=580 r = .09 n = 1 t = 9 <span> To find how much the balance is at the end of nine years, plug in all of the knows into the formula.</span> A = 1259.698 is how much the balance will be. (Rounded to 1259.70 if you round to the nearest cent).
No of people not from their neighborhood=25-20=5 total contact s=25 therefore probability to call a person not from his neighborhood=5/25=1/5 therefore P=1/5
