Mathematics, 22.06.2019 11:00 seimdakota

Plutonium–238 has a yearly decay constant of 7.9 × 10-3. if an original sample has a mass of 15 grams, how long will it take to decay to 12 grams? (at = a0e-kt) a. 3 years b. 12.3 years c. 28.3 years d. 139.1 years

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Plutonium–238 has a yearly decay constant of 7.9 × 10-3. if an original sample has a mass of 15 gram...