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English, 14.07.2019 17:00 lizzyhearts

Cerium-144 is a radioactive isotope with a half-life of 285 days. how lonh would it take for an initial sample of 10 grams of cerium-144 to decay until only 1 gram remains? a. about 2850 daysb. about 513 daysc. about 947 days d. about 855 days

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Cerium-144 is a radioactive isotope with a half-life of 285 days. how lonh would it take for an init...
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