Belle Vernon Area School District

-2 and -1 B. -1 and 0 C. 0 and 1 D. 1 and 2 E. 2 and 3 A radioactive substance decays so that half of the substance decays every 2 minutes. If 100 g of the substance are present initially, how many grams will be present after 4 minutes and 8 minutes respectively? ................
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