Determine the age of a fossil if it had only one eight of its original carbon - 14 content remain

Okay, here goes.

Since it has 1/8 that means it has gone around though 3 half-life cycles.

To find that we have to know that the half life of Carbon-14 is 5,730 years, we multiply that by three and we have 16,190 years. That's the age of the fossil.