What civilization gave mankind various practical inventions such as the inclined plane and pulley?Group of answer choicesBabylonianGreekall of the aboveEgyptian

hat civilization is considered as the first builder of civilization?Group of answer choicesSumeriansegyptianGreekbabylonian

All of the following are contributions of the Chinese civilization EXCEPTGroup of answer choicesgunpowderaqueducts.wheelbarrowwater wheel

Which of the following is the contribution of the Olmec civilization to mankind?Group of answer choicesUse calendar and developed counting system.none of the abovedeveloped the mathematical system that was based on the number 20.transformed steep mountainsides of their highlands.Next

What civilization developed mathematical system that was based on the number 20?Group of answer choicesIncaOlmecAztecMayan

Why did the ancient civilizations of China, Mesopotamia, and Egypt all developed?