Maria is a geologist studying a particular rock layer in a local mountain range. One of her colleagues had previously
discovered an uncommon dinosaur fossil in the same rock layer. Maria uses the known age of the fossil to determine
the age of the rock layer she is studying.
What dating method is Maria using?
dating

zheng he was a chinese explorer who lead seven great voyages on behalf of the chinese emperor. his seven total voyages were diplomatic, military, and trading ventures, and lasted from 1405 – 1433. however, most historians agree their main purpose was to promote the glory of ming dynasty china.

explanation:

he risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation: