plz hep p8 points if u do the table below shows the half-life of an element:
half-life data
element half-life
carbon-14 5,730 years
scientists have found that the carbon-14 content of an unknown prehistoric sample was reduced to one-half. what best describes the identity of the sample?
an organism that died more than 10,000 years ago
a rock that formed more than 10,000 years ago
an organism that died 5,730 years ago
a rock that formed 5,730 years ago