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The half-life of actinium-228 is 6.13 hours. What amount of a 7.0 milligram sample remains after 24.52 hours?

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The half-life of actinium-228 is 6.13 hours. What amount of a 7.0 milligram sample remains after 24....

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The half-life of actinium-228 is 6.13 hours. What amount of a 7.0 milligram sample remains after 24.52 hours?​

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The half-life of actinium-228 is 6.13 hours. What amount of a 7.0 milligram sample remains after 24.52 hours?