When charcoal is prepared from a living tree, it shows a disintegration rate of 15.3 disintegration of $^{14} C$ per gram per minute. A sample from an ancient piece of charcoal shows . $^{14} C$ activity to be 12.3 disintegration per gram per minute . how old is this sample? half-life of $^{14} C$ is 5730 y.

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When charcoal is prepared from a living tree, it shows a disintegration rate of 15.3 disintegration of 14C per gram per minute. A sample from an ancient piece of charcoal shows . 14C activity to be 12.3 disintegration per gram per minute . how old is this sample? half-life of 14C is 5730 y.