SOLUTION: Strontium-90 has half life of 28 years. If someone ingests 100 mg. How much will be left when they're so old?

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Question 609178: Strontium-90 has half life of 28 years. If someone ingests 100 mg. How much will be left when they're so old?
Answer by ankor@dixie-net.com(22740)   (Show Source): You can put this solution on YOUR website!
"so old"???
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