radium has a half life of 1660 years. If the initial amount of radium is 200 grams, how much will remain in 500 years?

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08-07-2014
Mathematics

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radium has a half life of 1660 years. If the initial amount of radium is 200 grams, how much will remain in 500 years?

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AL2006 AL2006 · Answer 1 · 2014-07-08T18:23:52-04:00

AL2006 AL2006

08-07-2014

Amount remaining = (original amount) x (2)^-(years/1660)

Amount remaining = (200) x (2)^-(500/1660)

= (200) x (2)^-(0.3012)

= (200) x (0.8116) = 162.3 grams (rounded)

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