Question

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.