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Polonium-218 has a half life of about 2 days. After 10 days, how many milligrams of a 1200 mg sample will remain?

Thanks so much for your help. I truly appreciate it. :)

 May 31, 2019
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R = 1200 x (1/2)^(10/2)

    =1200 x (1/2)^5

    =1200 x 0.03125

    =37.5 mg - will have remained after 10 days.

 May 31, 2019

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