SOLUTION: A 15 g sample of radioactive iodine decays in such a way that the mass remaining after t days is given by m(t) = 15e−0.087t, where m(t) is measured in grams. After how many

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Question 1072026: A 15 g sample of radioactive iodine decays in such a way that the mass remaining after t
days is given by m(t) = 15e−0.087t, where m(t) is measured in grams. After how many days are there
only 5 g remaining?

Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52777)   (Show Source): You can put this solution on YOUR website!
.
Do you think the mass goes to nowhere ?


If you think so, it is a big mistake.



Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!

------THIS way.








m=5, evaluate t.


or about 12 and a half day

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