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the half-life of bismuth-210 is 5 days. if 25 grams of bismuth-210 are present initially, how much will remain after 10 days?
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the half-life of bismuth-210 is 5 days. if 25 grams of bismuth-210 are present initially, how much will remain after 10 days?

User Rinke
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10 days is twice the half-life. After 5 days, can expect
\frac{25}2 grams to remain; after another 5 days, you'd be left with
\frac{25}4 grams.
User Jane Courtney
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