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Question content area top Part 1 A toxic radioactive substance with a density of 7 7 milligrams per square centimeter is detected in the ventilating

Question content area top
Part 1
A toxic radioactive substance with a density of
77
milligrams per square centimeter is detected in the ventilating ducts of a nuclear processing building that was used
5555
years ago. If the half- life of the substance is
2020
years, what was the density of the substance when it was deposited
5555
years ago?

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