What are four achievements of ancient Egyptians

The many achievements of the ancient Egyptians include the quarrying, surveying and construction techniques that supported the building of monumental pyramids, temples, and obelisks; a system of mathematics, a practical and effective system of medicine , and irrigation systems and agricultural production techniques.

Explanation:

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would not cooperate with each other voluntarily.

studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.