20. Done Use for questions 35-36: The average population (in thousands) of a city from 1970 to 1990 can be represented by the function p(r) 0.03-1.5+20+80 where r is the number of years since 1970. What is the instantaneous rate of change in population in 1973? A. 11.810 people/year B. 12,750 people/year C. 14,300 people/year D. 15.960 people/year A O B E: None of the Above

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