Is there such a thing as a social structure that constrains individual action, or is society nothing more than a figment of our imaginations?

What greek scientist created a screw to move water for irrigation?

Which term describes a possible explanation of, or answer to, a scientific question that is based on prior knowledge or research and that is testable?

Which of the following correctly describes a repurchase agreement? the sale of a security with a commitment to repurchase the same security at a specified future date and a designated price. the sale of a security with a commitment to repurchase the same security at a future date left unspecified, at a designated price. the purchase of a security with a commitment to purchase more of the same security at a specified future date.