Answer:
radiometric dating
Explanation:
Some minerals in rocks and organic matter for example bones and shells can contain radioactive isotopes. Any of parent and daughter isotopes in a sample can be measured and used to determine their age. This is known as radiometric dating.
2) yo tengo dos hermanas
3) usted tiene un cuaderno?
4) nosotros tenemos cinco profesores
5) ustedes tienen amigos de Mexico?
hope this helps!!
we have two aunts. they live in the city
