Psychology review: 11. An executive in a stockbrokerage firm works with his office door closed. At the same time every hour he opens the door to see what his employees are doing. The employees have learned to work only during the five minutes before he opens the door. Their work pattern is typical of responses that are reinforced on a schedule.
A. fixed-ratio
B. fixed-interval
C. variable-ratio
D. variable-interval

What happened in the 2000 election of al gore vs bush

How did the southeast asia treaty organization (seato) carry out the united states policy on containment? a. seato promoted the creation of united nation military bases to create regional defense. b. seato founded an organization seeking to educate southeastern asian countries on communism. c. seato established a regional economic union to promote monetary security. d. seato sought to provide regional security in southeast asia by establishing alliances.

Where is sub-saharan africa located?