MATH 117 Appendix D

# MATH 117 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 a. What is the cost to remove 75% of the pollutant? = - , = C 6000200 2x x 75 – Original equation and value for x to be plugged in to find cost = - C 6000200 275 – Value substituted for x to find the cost = - C 6000200 150 – Multiplication = C 600050 – Subtraction = ( ) C \$120 in millions – Final division and cost % It will cost 120 million dollars to remove 75 of the pollution from the lake b. What is the cost to remove 90% of the pollutant? = - , = C 6000200 2x x 90 – Original equation and value for x to be plugged in to find cost = - C 6000200 290 – Value substituted for x to find the cost = - C 6000200 180 – Multiplication = C 600020 – Subtraction = ( ) C \$300 in millions – Final division and cost % It will cost 300 million dollars to remove 90 of the pollution from the lake MAT/117

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c. What is the cost to remove 99% of the pollutant? = - , = C 6000200 2x x 99 – Original equation and value for x to be plugged in to find cost = - C 6000200 299 – Value substituted for x to find the cost = - C 6000200 198 – Multiplication = C 60002 – Subtraction = ( ) C \$3000 in millions – Final division and cost % It will cost 3000 million or 3 billion dollars to remove 99
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## This note was uploaded on 04/20/2011 for the course MATH 116 taught by Professor Mcmillian during the Spring '09 term at University of Phoenix.

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MATH 117 Appendix D - Axia College Material Appendix D The...

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