SOLUTION: A substance has a half-life of 52 days. If you have 113 grams initially, how much is left after 125 days?

Question 1159236: A substance has a half-life of 52 days. If you have 113 grams initially, how much is left after 125 days?
Answer by ikleyn(52786) (Show Source): You can put this solution on YOUR website!
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First you calculate how many half-life periods are there in 125 days:  

    the number of half-life periods =  = 2.404 (approximately).



Then the amount of remaining substance is   = 21.350 grams.    ANSWER

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