What were the achievements of the maya and the aztec civilizations

the ancient maya. mayan civilization lasted for more than 2,000 years, but the period from about 300 a.d. to 900 a.d., known as the classic period, was its heyday. during that time, the maya developed a complex understanding of astronomy.

north atlantic treaty organization.

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.

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