How did new tools revolutionize agriculture during the Neolithic era?

Concealer circle oh in which arc xy measures 16 pi centimeters the length of the radius of the circle is 32 cm what is the circumference of the circle

Which movement developed in the early 1900s and encouraged the nationalist spirit of africans throughout the world? a. african nationalist b. tribalism c. pan-africanism d. african union

Name the two rivers that run through the fertile crescent. how were the rivers both positive and negative to societies of the fertile crescent?