The cost-benefit equation relates the cost D (in thousands of dollars) needed to remove x...

The cost-benefit equation relates the cost D (in thousands of dollars) needed to remove x percent of a pollutant from the emissions of a factory. Find the percent of the pollutant removed when the following amounts are spent.

(a) $50,000 [Here D = 50]

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(b) $100,000

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(c) $200,000