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Acave with beautiful prehistoric wall paintings was discovered. Some charcoal found in the cave contained 30% of the 14C expected in living trees. How old

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Acave with beautiful prehistoric wall paintings was discovered. Some charcoal found in the cave contained 30% of the 14C expected in living trees. How old are the cave paintings? (The decay constant for 14C is .00012.) The cave paintings are years old. (Round to the nearest year as needed.)

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