Question

directions: select the correct answer. carbon - 14 has a half - life of 5,730 years.
if the bone has 25% of its carbon - 14 remaining, how many half - lives have gone by?
percent of carbon - 14
remaining
age of a fossil based on carbon - 14
half - lives

Explanation:

Step1: Understand the concept of half - lives

Each half - life reduces the amount of Carbon - 14 by half.

Step2: Calculate the number of half - lives

If we start with 100% (after 0 half - lives), after 1 half - life: \(100\%\times\frac{1}{2}=50\%\), after 2 half - lives: \(50\%\times\frac{1}{2} = 25\%\)

Answer:

2