posted by Micah .
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?
For what value is theis equation undefined?
Just plug in numbers and calculate. In the case of 75% the asnwer is
C = 6,000/(200-150) = $120 (Million$)
The equation is defined for o<=x<100 (%)