Answer:
The answer to your problem is: 11136 years
Explanation:
Data
Original amount of carbon-14: 100 frames
half life of carbon-14 = 5,568 years
Only contains 25 grams of carbon-14
Question: how many years ago was this carbon-14 part of a tree.
Process
100 grames of carbon-14
50 grames of carbon-14 one half life
25 grames of carbon-14 one half life
Total two half-lifes
1 half-life ---------------- 5568 years
2 half -lifes ------------- x
x = 2x5568 / 1 = 11136 years
