Al-Khwarizmi developed algebra.
Answer:
Farms tended to be small. With few exceptions, crops grown in the northeast never went more than a few miles from where they were grown. ... Southern farmers have a much longer growing season allowing for multiple harvest dates and a very wide range of crops.
The correct answer is <span>Invasion of Cambodia
Although the war had been localized to Vietnam, in 1970 the Southern Vietnamese army with the help of the United States troops had invaded into Cambodia who was also having the same problems as the Vietnamese, the communists were fighting those against communism, so Vietnamese people decided to join the fight, which stirred a new round of protests.</span>
