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Associate Level 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 a. What is the cost to remove 75% of the pollutant? 6000 6000 6000
C = --------------- = --------------- = ------------ = $120 200 – 2 * 75 200 – 150 50

b. What is the cost to remove 90% of the pollutant? 6000 6000 6000
C = ------------------ = ------------------- = ----------- = $ 300 200 – 2 * 90 200 – 180 20

c. What is the cost to remove 99% of the pollutant? 6000 6000 6000
C = ------------------- = ------------------ = -------------- = $ 3,000 200 – 2 * 99 200 – 198 2 d. For what value is this equation undefined? The equation is undefined for X = 100%

e. Do the answers to sections a. through d. match your expectations? Explain why or why not.

It is expected that the amount of the pollutant would increase per each percentage. The percentages get higher for each problem therefore making the pollutant higher as well. I thought that they would be higher as the…...

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