The three enlightened monarchs of the 18th century were:
1. Joseph II of the Holy Roman Empire
2. Catherine the Great of Russia
3. Frederick the Great of Prussia
Answer:
pickle rick is the answer
Answer: if you are interested in the formula you can check the video at the link below - it contains instructions about how to calculate the age of an object based on the carbon-14 atoms.. and it should be pretty self explanatory!
Explanation: