Concept explainers
Environment. Suppose an environmental agency decides to get rid of the impurities from the water of a polluted river. The estimated cost of removing x% of the impurities is given by
billion dollars.
a. How much will it cost to remove 50% of the impurities?
b. Sketch the graph of
c. Estimate the percentage of the impurities that can be removed at a cost of $30 billion.
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