Los incas desarrollaron los quipus como forma de registro numérico.

these conditions long with a short growing season made farming difficult.

explanation:

the north has a climate of warm summers and snowy cold winters. the terrain is rocky, hilly, and not good for farming.

"the gulf of tonkin resolution in 1967".

the gulf of tonkin resolution (officially called southeast asia resolution, public law 88-408) is a law issued by the congress of the united states of america on august 7, 1964, in which president lyndon b. johnson was authorized1 to act in a comprehensive manner against the democratic republic of vietnam, which he accused of aggressions against us ships in the gulf of tonkin, where the resolution takes its name. the gulf of tonkin resolution is of historical importance because it gave authorization to the us president. lyndon b. johnson, without a formal declaration of war by congress, to use military force in southeast asia.

andreas vesalius

hope this !

in the 1900s, the united states was still a largely agrarian society with a very fast growing industrial and manufactering sector.

the south of the country was the bread basket of the country with large farm lands making up a majority of the economy.

in the north and more specficially north-west, growing manufactering and export sector had made the united states into a powerful exporting country.

this peaked in the 50s and 60s when the united states became the largest economy in the world and the largest exporter.

today, the majority of the united states economy is made up of the services sector that includes banking, insurance, music, movies, hotels etc.