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11-10.

Natural logs and exponential functions with base are often used in formulas. But many problems can be solved equally well using either a base- logarithm or a base- logarithm. Solve each of the following problems, first using the  key (base ) and then using the key (base ) on your calculator.

  1. log log

    log log

    You should get the same answer using natural logs.

  1. See part (a).

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

    What does represent in this equation?

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

    What does represent in this equation?