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 Everyday Examples
 Exponent:  The number of times a number or expression (called base) is used as a factor of repeated multiplication. Also called the power.

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The exponent is often associated with time in exponential growth and decay situations. For example, if bacteria in a culture doubles every hour, then the number of bacteria, n, present after t hours can be represented by the equation n = i2t, where i is the initial amount of bacteria present.

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If the value of an automobile decreases by 20% each year, then the price, p, of a used car that is t years old can be determined by the equation p=n(0.80)t, where n is the price of a new car.