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Exponential Decay Formula Proof (can skip, involves Calculus)

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Uploaded on Sep 11, 2009

More free lessons at: http://www.khanacademy.org/video?v=H7...
Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class.

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