35. what does a higher percentage of daughter isotopes in a rock mean?

35. what does a higher percentage of daughter isotopes in a rock mean?
Answer
Brief Explanations:
In radioactive - decay, parent isotopes decay into daughter isotopes over time. A higher percentage of daughter isotopes in a rock indicates that more of the parent isotopes have decayed. This means the rock is older as it has been around for a longer time, allowing more of the radioactive decay process to occur.
Answer:
The rock is older.