Question 455189
below is the question for rational equations. 
the cost in millions of dollars, to remove x% of pollution in a lake modeled by 
c= 6000/200-2x 
what is the cost to remove 75% of the polluant?
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C(75) = 6000/(200-2(75))
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= 6000/(50)
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= $120 million
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Cheers,
Stan H.