47. Investors willing to take on risk without return are: a. Irrational b. Typical c. Risk averse 48. An interest rate is: a. b. C. The rate at which money is made or lost in the stock market The cost of money The change in the value of money one year to the next 49. A single percentage point in the interest rate over time: a. b. c. Makes no difference in the amount you earn over time Makes a difference in the amount you earn over time Only makes a difference after twenty years