half life of a radio isotope is 5 years. Fraction of substance that decay in 15 years?
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half life of any substance is the time it takes for half of the given amount to decompose
hence, the fraction of substance that will decay in 15 years is:1/2+1/4+1/8=7/8
hence, the fraction of substance that will decay in 15 years is:1/2+1/4+1/8=7/8
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