7. How many survivors were there out of the 30.000 imprisoned at Tuol Sleng Prison?

12 people

Explanation:

and there was only 20,000 imprisoned

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.