Answer:
I'm not sure about question number 1 but number 2: It was dubbed "The Cold War" because neither United States or the Soviet Union declared war. Hope this helps :}
It causes slave rebellion and anti-colonial uprising. They founded the first black republic in modern history that they called Haiti.
I think it is 50°. If 130 is also the angle of elevation, then it is also the angle of depression. So the two angles up there (depression and x) equal 180 so - 130 = 50.