Multiple Choice
A rock sample containing an isotope with a half-life of 28 million years has an initial mass of 184 grams. How much time has elapsed after three half-lives?
A) 6.5 million years
B) 9.3 million years
C) 32 million years
D) 56 million years
E) 84 million years
Correct Answer:
Verified
Correct Answer:
Verified
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