Asked by Anonymous
there are 500g of cobalt to 60 that has a half life of 5years ,how many grams of cobalt are remained after 15years
Answers
Answered by
Damon
Three half lives
500 * 1/2 * 1/2 * 1/2
= 500/8 grams
500 * 1/2 * 1/2 * 1/2
= 500/8 grams
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