Probably the invention of Papyrus (paper)
Answer:
By notching a stick, knotting a string, weaving a pattern, or carving or painting images in rock
Explanation:
By 20,000 BC, primitive cultures had developed methods of storing information mechanically. By notching a stick, knotting a string, weaving a pattern, or carving or painting images in rock, information could be stored by one person for transmission to others or recall at some later time.
The greatest common factor is 10. It is the biggest number that goes into 20 and 30 evenly.
~Silver
Public Works Administration is which <span>New Deal agency did the National Recovery Administration most closely work. The PWA is part of New Deal of 1933, it was a huge public works construction agency in the United States that was headed by Harold L. Ickes. </span>
