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Geography, 12.01.2020 04:31 huwoman

Asubstance has a half-life of 60,000 years and an initial mass of 1,000 grams. how many years will pass before only 250 grams of the substance's parent material is left?

30,000
90,000
120,000
240,000

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Asubstance has a half-life of 60,000 years and an initial mass of 1,000 grams. how many years will p...
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