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Carbon Dating Presumes That, as Long as a Plant or Animal

Question 46

Multiple Choice

Carbon dating presumes that, as long as a plant or animal is alive, the proportion of its carbon that is 14C is constant. The amount of 14C in an object made from harvested plants, like paper, will decline exponentially according to the equation Carbon dating presumes that, as long as a plant or animal is alive, the proportion of its carbon that is <sup>14</sup>C is constant. The amount of <sup>14</sup>C in an object made from harvested plants, like paper, will decline exponentially according to the equation   , where A represents the amount of <sup>14</sup>C in the object, A<sub>o</sub> represents the amount of <sup>14</sup>C in living organisms, and t is the time in years since the plant was harvested. If an archeological artifact has 25% as much <sup>14</sup>C as a living organism, how old would you predict it to be? Round to the nearest year. A) 26,536 years B) 5715 years C) 11,429 years D) 13,967 years E) 107 years , where A represents the amount of 14C in the object, Ao represents the amount of 14C in living organisms, and t is the time in years since the plant was harvested. If an archeological artifact has 25% as much 14C as a living organism, how old would you predict it to be? Round to the nearest year.


A) 26,536 years
B) 5715 years
C) 11,429 years
D) 13,967 years
E) 107 years

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