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The 14C activity of some ancient Peruvian corn was found to be 10 disintegrations per minute per gram of carbon. If present-day plant life shows 15 dpm/g, how old is the Peruvian corn? The half-life of 14C is 5730 yr.
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A long-term nutritional support method involving the administration of nutrients directly into the stomach or intestine through a tube.
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