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Contents In this lecture we will discuss exponential and logarithmic functions, and their graphs. These functions turn out be very useful in modeling growth of populations. They are central to formulas for compound interest in banking and in computing ages of objects using radioactive decay. Quick Question What is the relationship between the graphs of ex and ln(x)? Answer Outline Outline for Exponential and Logarithmic Functions Textbook Exponential and Logarithmic Functions Today's Homework Log into WebWorK Quiz Exponential and Logarithmic Functions Quiz Examples Find the ground noise created by an airplane Find the inverse of an exponential function Find all solutions to the equation ln(x + 4) = 2ln(x) – ln(2) Applets Exponential Curves Videos graphs of ex and e(.5x) If e(2x +7) = 5, what is x? Graphing ln x If ln(3x2) = 10 what is x?

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