If you invest $9000 in an account at 15% compounded monthly, how long will it take for the investment to double in value? DIRECTIONS for SHOWING WORK: Show all relevant steps, including any formulas you use, so it's clear how you obtained your answer. Use the EQUATION EDITOR to type all mathematical equations and formulas. Write your final answer in a complete sentence in the context of the problem. Round your final answer to the first decimal place. Paragraph BI UA Lato (Recom... 19px v 7 58 5. C 11