Which oil tycoon used horizontal integration to decrease costs and increase profits

Unique among the rulers of this time, persian emperors installed governors in their provinces tolerated local cultures and laws wielded absolute power maintained an extensive army

What was one major cause of worldwide conflict during the first decade of the 21st century?

The function y= -x-3 is graphed only over the domain of {x|8 a: {|-5 b: {y|1 c: {y|1 d: {y|1