Question- the half life of potassium-40 is 126x109 yrs if, Ask an Expert

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Question- The half life of potassium-40 is 1.26X10^9 yrs, if the natural abundance of k-40 is .010% and 3500 disinigrations of k-40 occur every 10 sec in a human body weighing 100kg then what is the concentration of potassium (include all isotopes) in that body? Assume the density of the human body is 1.0g/mL since it is made mostly of water.

Please perform what you can and illustrate your work so I can follow. Thanks

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