Which of the following ancient Greeks developed an understanding of the use of lever and pulley A) Democritus
B)Archimedes
C) pythagoras
D) Praxiteles

B) Archimedes

Explanation:

In 300 BC, Archimedes, a Greek philosopher, discovered the concept of simple machines. He mainly focused on the lever, pulley, and screw mechanisms, and was the first to develop the notion of mechanical advantage in levers.

after world war ii, the united states and the soviet union were the major economic, military, and political powers. the world was bilateral multipolar bipolar unilateral

after world war ii, the united states and the soviet union were the major economic, military, and political powers. the world was bipolar.  

the great leap forward, mao zedong's plan to increase china's agricultural and industrial production, was an overwhelming success. true false

the great leap forward, mao zedong's plan to increase china's agricultural and industrial production, was an overwhelming success. true.

explanation:

the government closely monitored its finances to avoid another financial collapse.