Question: An 18.8438 g sample of petrified wood was found in a petrified forest. The sample showed a 14C activity of 11.2 decays/min. The half-life of carbon-14 is 5730 years and freshly cut wood contains 6.5 × 1010 atoms/g of 14C and there are 365.25 days in a year.
Part A: How long has the tree been dead?
Answer in units of years.
I want help to find how long the tree has been dead.