Suppose that $1,000 is invested at 6% interest compounded monthly. Use the formula nt A = P(1 + − ) n n (a) How long (to the nearest month) before the value is $1,250? years, months (b) How long (to the nearest month) before the money doubles? years, months (c) What is the interest rate (compounded monthly and rounded to the nearest percent) if the money doubles in 5 years? %