What divides north and south sudan? if you answer it i am going to give a you, rate 5 stars, and brainiest  !           so answer !

One of the brightest comets of the 20th century was comet hyakutake, which passed close to the sun in early 1996. the orbital period of this comet is estimated to be about 30,000 years. find the semi-major axis of this comet’s orbit. compare it to the average sun-pluto distance and to the distance to alpha centauri, the nearest star to the sun, which is 4.3 light-years distant.

According ti the following map, what are the most common mineral resources found in the united states?

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4