#1. If the amount of the parent isotope in the original sample of a rock had been 48 grams, about how much would have been left after three half-lives? Q1. Which of the following best describe the solution to your final answer in PROBLEM # 1? A. 1/8 X 48 g В. 1/6 X 48 д С. 1/10 X 48 Q2. The FINAL ANSWER to PROBLEM #1 is? A. one sixth the original amount of parent isotope B. 8 grams C. 6 grams D. 4.8 grams

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