The half-life of a radioactive substance is the time required for half of a sample to undergo radioactive decay,or for the quant
ity to fall to half its original amount.Carbon 14 has a half-line of 5730 years.Suppose given samples of carbon 14 weigh 5/8 of a pound and 7/8 of a pound.What was the total weight of the samples 11,460 years ago?
