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 [pic] a. What is the cost to remove 75% of the pollutant? [pic]

[pic]

[pic]

C=120

b. What is the cost to remove 90% of the pollutant? [pic]

[pic]

[pic]

C=300

c. What is the cost to remove 99% of the pollutant? [pic]

[pic]

[pic]

C=3000

d. For what value is this equation undefined? 200 - 2x = 0 200 = 2x X=100

e. Do the answers to sections a. through d. match your expectations? Explain why or why not. Yes, the answers match my expectations because the greater the pollution, the more money it would take to clean it up.

Busch Enteratinment Corporation. (N.D.). Flamingos. Retrieved from http://www.seaworld.org/animal-info/info-books/flamingo/physical-characteristics.htm

2. Biologists want to set up a station to test alligators in the lake for West Nile Virus. Suppose that the costs for such a station are $2,500 for setup costs and $3.00 to administer each test.

a. Write an