The half-life of carbon-14 is 5730 years. Explain how to figure out the age of a substance that has 25% carbon-14 remaining?
A) Multiply 25% times 5730 years since only 25% of the carbon remains.
B) Divide 5730 years by 2 since carbon has went through two half-lives.
C) Multiply 5730 years by 2 since two half-lives have went by for carbon.
D) Multiply 4 times 5730 years since carbon has went through 4 half-lives.
A) Multiply 25% times 5730 years since only 25% of the carbon remains.
B) Divide 5730 years by 2 since carbon has went through two half-lives.
C) Multiply 5730 years by 2 since two half-lives have went by for carbon.
D) Multiply 4 times 5730 years since carbon has went through 4 half-lives.
1 Answer
Sep 20, 2017
C
Explanation:
25% is two half lives.
Each half life requires 5730 years.
So two half lives requires
