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# Appendix D - Axia College Material Appendix D The...

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Axia College Material Appendix D The Environment Environmental and wildlife preservation ensures future generations will have available resources and can enjoy the beauty of Earth. On the other hand, some of the damage humans have already done to the environment is expensive and time consuming to eradicate. Application Practice Answer the following questions. Use Equation Editor to write mathematical expressions and equations. First, save this file to your hard drive by selecting Save As from the File menu. Click the white space below each question to maintain proper formatting. 1. The cost, in millions of dollars, to remove x % of pollution in a lake modeled by x C 2 200 000 , 6 - = a. What is the cost to remove 75% of the pollutant? C = 6,000 200 2(75) 6,000 200 150 6,000 50 - = - = = 120 million b. What is the cost to remove 90 % of the pollutant? C 6,000 200 2(90) 6,000 200 180 6,000 20 = - = - = = 300 million c. What is the cost to remove 99% of the pollutant? MAT 117

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C 6,000 200 2(99) 6,000 200 198 6,000 2 = - = - = = 3,000 million d. For what value is this equation undefined?
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