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  3. the half-life of radium-226 is 1,590 years.(a) a s

The half-life of radium-226 is 1,590 years.(a) A sample of radium-226 has a mass of...

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The half-life of radium-226 is 1,590 years.(a) A sample of radium-226 has a mass of 50 mg. Find a formula for the mass of the sample that remains after t years.(b) Find the mass after 1,500 years correct to the nearest milligram.(c) When will the mass be reduced to 30 mg?

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