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Radioactive radium has a half-life of approximately 1599 years. What percent of a given amount remains after 100 years?
14 years ago

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MattsRiceBowl
left=original*e^(.692t/1599)

left/original= e^ ( )

put in t=100, and solve.
14 years ago
bobpursley
Sorry, Matt.
14 years ago

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