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anonymous
 3 years ago
An isotope of carbon that is radioactive is _________.
A. carbon12
B. carbon13
C. carbon14
D. carbon15
anonymous
 3 years ago
An isotope of carbon that is radioactive is _________. A. carbon12 B. carbon13 C. carbon14 D. carbon15

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0By applying the law of superposition, _______________ dates can be determined. A. relative B. absolute C. radiometric D. isotope

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Fishes were first abundant during the ... A. Precambrian B. Paleozoic C. Mesozoic D. Cenozoic i out c it was wrong
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