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44 G of Petrified Wood Was Found in a Petrified

Question 25

Multiple Choice

44 g of petrified wood was found in a petrified forest. A sample showed a 14C activity of 100 decays/minute. How long has the tree been dead (in years) ? (The half-life of carbon-14 is 5730 years and freshly cut wood contains 6.5 × 1010 atoms of 14C per gram.)


A) 12300
B) 15600
C) 8500
D) 4700
E) 2400

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