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While having a socially distanced barbecue with her family, Brenda's dog digs up a dead
cat. This causes Brenda's family to get into a heated argument about how old the cat is.
To stop her family from fighting, Brenda grabs a 5 gram sample from the cat and finds that
the Carbon-14 in it undergoes 0.9 decays per second. How long ago did Brenda's cat die?
O 2,700 years ago
2 years ago
6,500 years ago
21,200 years ago

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