Pollutant removal: For a certain coal-burning power plant, the cost to remove pollutants f...

Pollutant removal: For a certain coal-burning power plant, the cost to remove pollutants from plant emissions can be modeled by  −80, where C(p) represents the cost (in thousands of dollars) to remove p percent of the pollutants. (a) Find the cost to remove 20%, 50%, and 80% of the pollutants, then comment on the results; (b) graph the function using an appropriate scale; and (c) use mathematical notation to state what happens if the power company attempts to remove 100% of the pollutants.