(Answered) Archaeologists use the year 1950 as the date of the present

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Archaeologists use the year 1950 as the date of the present. So 1000 bc is 2950 B.P. (before the present). An archaeologist finds that the carbon-14 content of a wooden needle is 11% of that of trees living today. At what date B.P. was the tree from which the needle was made cut down?

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