The half-life of carbon-14 is 5,730 years. after 11,460 years, how much of the original carbon-14 remains?

After 1 half-life, 12 of the C-14 would remain. After 2 half-life, 12 of the 12 of the C-14 = 14 of the C-14 would remain. After 3 half-life, 12 of the 14 of the C-14 = 18 of the C-14 would remain. ...After n half-lives, 12n of the C-14 would remain. Was this helpful? Let the contributor know! Yes. Post comment 1500

C) the increase in atmospheric pressure pushes the walls of the balloon outward thus making it  is the answer.hope i you.