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Home > A2C > Chapter 12 > Lesson 12.5.2 > Problem 12-206


Natural logs and exponential functions in base e are often used in formulas. For many problems you can use either the or the key on your calculator. Solve each of the following problems, first using base and then using natural logs.

  1. You should get the same answer using natural logs.

  2. See part (a).

  3. Interpret the answer for part (a) if the equation represents an amount of money invested at annual interest.

    What does x represent in this equation?

  4. Interpret the answer to part (b) if the equation represents the price paid for a car that depreciates at per year.

    What does represent in this equation?