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If there is a radiation that has a half life of 10 days and we have it for 110 days, what will be the fraction of radiation left?
14 years ago

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DrBob222
k = 0.693/10 days.
Substitute into the expression below.
ln(No/N) = kt.
Solve for No/N and take the reciprocal. You want N/No.
14 years ago

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