Be sure to answer all parts.
The carbon−14 decay rate of a sample obtained from a young tree is 0.254 disintegration per second per gram of the sample. Another wood sample prepared from an object recovered at an archaeological excavation gives a decay rate of 0.178 disintegration per second per gram of the sample. What is the age of the object?
(The half-life of carbon−14 is 5715 years.)