3. A shark tank venture capitalist offers to loan you $30,000 today to purchase drones needed for your proposed precision ag business if you will promise to pay her back $60,000 in a lump sum 9 years from now. What annual interest rate is she using? Show algebraic work and also solve using the appropriate finance function. 4. How many years will it take $20,000.00 to turn into $160,000.00 at a rate of 6.0% per year (annual compounding)? Use the rule of 72 to approximate, then confirm that you are close using the appropriate finance function