A living plant contains approximately the same isotopic abundance of ^{14}C as does atmospheric carbon dioxide

From the equation which determines the length of time elapsed:

5730 yr x n = 17000 yr

n= 0.296684

(1/2)^0.296684=0.814121

From the equation which determines the fraction of C-14 remaining we will have:

X/15.3 = 0.814121

X=12.456 disintegrations per minute per gram of carbon

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