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The cost, in millions of dollars, to remove x % of pollution in a lake modeled by c=6,000/200-2x

What is the cost to remove 75% of the pollutant?

I am so lost, there are other percents if someone can show me this one I can figure out the other questions.

  • algebra -

    put in 75 for x, and calculate. I get about 6000/(50)=120 million dollars

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