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The half-life of thorium-227 is 18.72 days. How many days are required for three-fourths of a given amount to decay? I'm not quite sure how to set it up to even start worki…

The half-life of thorium-227 is 18.72 days. How many days are required for three-fourths of a given amount to decay? I'm not quite sure how to set it up to even start worki…
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The half-life of thorium-227 is 18.72 days. How many days are required for three-fourths of a given amount to decay?

I'm not quite sure how to set it up to even start working it? help would be appreciated! Thanks!!

asked
User Ronen Cypis
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1 Answer

2 votes
t½=18.72days
therefore t¾=18.72+½ of 18.72
we have 18.72+9.36=28.08days
answered
User Paul De Barros
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7.5k points
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