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2014-08-25T04:53:36+05:30

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1)    Age of Sea Shell : it contains 90% = 0.9
       age = - T1/2  Ln 0.9 / Ln 2 = 846.66 years

2)   age when C-14 was 99% : - T1/2  Ln 0.99 / Ln 2 = 80.76 yrs
       Duration for C-14 content to diminish to 90% from 99% : 765.9 years


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