SOLUTION: If 10 g of a radioactive substance are present initially and 9 yr later only 5 g​ remain, how much of the substance will be present after 14 ​yr?
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Question 1128806: If 10 g of a radioactive substance are present initially and 9 yr later only 5 g remain, how much of the substance will be present after 14 yr?
Answer by josgarithmetic(39623) (Show Source): You can put this solution on YOUR website!
After 14 years, from what?
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--------the model to use.
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this is not the only exponential model possible.
notice that the given data is for half-life.
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