A wooden object from the site of an ancient temple has a carbon-14 activity of 10.0 counts per minute compared with a reference piece of wood cut…

A wooden object from the site of an ancient temple has a carbon-14 activity of 10.0 counts per minute compared with a reference piece of wood cut today that has an activity of 80.0 counts per minute. If the half-life for carbon-14 is 5730 years, what is the age of the ancient wood object?