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Question
A factory is polluting a river such that at every mile down river from the factory an environmental expert finds 15% less pollutant than at the preceding mile. If the pollutant's concentration is 500 ppm (parts per million) at the factory, what is its concentration 15 miles down river?A) 75.00 ppm
B) 225.00 ppm
C) 43.68 ppm
D) 588.24 ppm
E) 51.38 ppm
Answer
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