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# 3.12: Exponential Decay

Difficulty Level: At Grade Created by: CK-12
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Practice Exponential Decay

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Estimated11 minsto complete
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Estimated11 minsto complete
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### Vocabulary Language: English

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 $y=a \cdot b^{x-h}+k$.

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.

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