Multiple Choice
The number of grams of a radioactive substance in charcoal from an ancient campfire after t years is given by 
. If the sample has only 15 grams of radioactive substance, then when was the campfire used?
A) 5,752 years ago
B) 4,706 years ago
C) 12,040 years ago
D) 5,229 years ago
Correct Answer:
Verified
Correct Answer:
Verified
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