Question

You've found some fossil bones while digging in your backyard. Could they be dinosaur bones? Using carbon dating, you determine that 3% of the original radioactive carbon-14 is still radioactive. (The rest has decayed into nitrogen-14.) How many half-life cycles has it gone through?

The half-life of Carbon-14 is 5730 years. When did the animal die?

Answer 1

5 is the first answer and 28,650 for second