# sciencemath

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Suppose a laboratory has a 31 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 966 days? How much polonium is in the sample 966 days later?

• sciencemath -

966/138 = 7

7 half-lives means that 1/128 of the original 31g remains.

• Algebra -

Suppose a laboratory has a 31 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 966 days? How much polonium is in the sample 966 days later?

• sciencemath -

7:.24

• sciencemath -

21

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