The radioactive substance neptunium-139 decays to (73.36 %) of its original amount after 24 hours. How long
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The radioactive substance neptunium-139 decays to \(73.36 \%\) of its original amount after 24 hours. How long (to the nearest hour) would it take for \(43 \%\) of the original neptunium to be present? What is the half-life of neptunium-139?
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