# 3.12: Exponential Decay

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Exponential decay

Exponential decay occurs when a quantity decreases by the same proportion in each given time period.Exponential Function

An exponential function is a function whose variable is in the exponent. The general form is .Half-life

Half-life refers to the time required for a radioactive material to decay to one-half of its initial concentration.Model

A model is a mathematical expression or function used to describe a physical item or situation.Newton's Law of Cooling

Newton's law of cooling is used to calculate changes in temperature of an object immersed in a fluid of a different temperature.### Image Attributions

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Developing exponential decay models with algebra.

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Date Created:

Nov 01, 2012
Last Modified:

Mar 23, 2016
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