PLEASE SHOW DETAILED WORK.

a) Suppose you are offered an investment that will allow you to double your money in 6 years. You have $10,000 to invest. What is the implied rate of interest? b) You have $10,000 to invest. How long will it take to double this $10,000 in value if it earns 5% annually? How long does it take if you use the rule of 72? r=(FV/PV)-1 t = ln(FV / PV) / In(1+r) Rule of 72 = 72/r%