1. about how many carbon 14 atoms from a sample of 800 C 14 atoms will remain after 2.0 half lives? show ur work. 2. about how many N 14 atoms will be present from a sample of 800 C 14 atoms after 2.0 half lives? show ur work.

3. 100 C 14 atoms remain from a sample of 1600 C 14 atoms. A. how many half-lives have passed?show ur work.
B. how much time has passed ?(the half-life of C 14 is 5730 years) show ur work.