The Carbon-14 Activity of Some Ancient Indian Corn Was Found

question 111

Multiple Choice

The carbon-14 activity of some ancient Indian corn was found to be 7.0 disintegrations per minute (dpm) per gram of carbon. If present-day plant life has 16 dpm per gram of carbon, how old is the Indian corn? (t_1/2 = 5,730 yr)

• A) 6,800 yr
• B) 2,500 yr
• C) 4,700 yr
• D) 10,000 yr
• E) 7,200 yr

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