Answer:variable - interval
Explanation: In the this scenario, The humanities instructor is using a variable-interval schedule of reinforcement. The instructor used the word 'surprise' meaning the time and date of the test isn't fixed and the quizzes will come up at unpredictable time intervals. This kind of reinforcement results in a steady response rate as it keeps students on their toes simply due to the fact that they have no idea of when the quizzes are coming up.
Answer:
B
Explanation:
This would be historical geography because when African slaves were brought to the United States, they were brought to the south to work. Today, many African-Americans still live in the South because that is where their ancestors were brought and lived.
As far as I know, it was the Chinese - there is evidence they had movable printing press as early as in 12th century.
In Europe the movable print was devised by Johannes Gutenberg in Germany, Mainz.
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The main way in which colonial government differed from present-day government in the United States is that the governors were all appointed by the King, meaning that the people had far less control over their government than today. Of course blacks and women had practically no rights in the colonial era as well.
After Alexander died in 323 B.C., his generals (known as the Diadochoi) divided his conquered lands amongst themselves. Soon, those fragments of the Alexandrian empire had become three powerful dynasties: the Seleucids of Syria and Persia, the Ptolemies of Egypt and the Antigonids
