The elaborate web of computer networks that people and businesses use today to exchange information is an example of improved technology in

a) construction
b) communication
c) production
d) transportation

Scientist believe that earths core is around 6000°c where does this heat come from

The rocky mountain system stretching from canada to new mexico is a string of mountains running along the wester united states. what factors would mostly cause this arrangement of mountains? intense pressure undemeath a tectonie plate that could not breakthrough the rock subduction of a tectonic plate, which pushed up a neighboring plate into mountains two plates located at a diverging boundary with a third plate rising between them two plates that melted into molten rock, which later cooled into the shape of mountains

How did the europeans design the national borders of africa? why?