According to "Katherine Johnson Biography," what job did Katherine take upon graduating from West Virginia State College in 1937? She went to work for NACA's Langley Laboratory.

She tutored students at her home.

She became a graduate assistant at West Virginia University.

She taught at a black public school in Virginia.

Explanation:

                                       ah  100% right

(1) We pay taxes for federeal reasons and local srevices. (2)The parties involved in the tripartie struggle were Pratihara Empire, the Pala Empire, and the Rashtrakuta Empire. (3) An ecosystem is a community of living and nonliving organisms interacting.  

Explanation:

(1) Taxes pay for social security, medicare, defense, and education. (mostly defense though if you're American)

(2) The empires were fighting over control of northern India and took place in the ninth century.

(3) An ecosystem is a combination of abiotic and biotic (nonliving and living) organisms interacting with eachother and depend on each other for food and habitats.