Question 366807: I am having trouble with my Appendix D. This is what I hsve so far. Can someone let me know if I am on the right track?
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 C=5,000/300-3x
a. What is the cost to remove 60% of the pollutant?
C=_5,000
300-3x
C=5,000
300-3(60)
C=5,000
300-180
C=5,000
120
C=$42 million
b. What is the cost to remove 80 % of the pollutant?
C=5,000
300-3x
C=5,000
300-3(80)
C=5,000
300-240
C=5,000
60
C=$83 million
c. What is the cost to remove 95% of the pollutant?
C=5,000
300-3x
C=5,000
300-3(95)
C=5,000
300-285
C=5,000
15
C=$333 million
d. For what value is this equation undefined?
The equation is undefined when x=100, and that’s because the bottom of the fraction =0, at x=100.
300-3x
300-3x-3x-3x
x=100
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 1. The cost, in millions of dollars, to remove x % of pollution in a lake modeled by C=5,000/300-3x
a. What is the cost to remove 60% of the pollutant?
C=_5,000
300-3x
C=5,000
300-3(60)
C=5,000
300-180
C=5,000
120
C=$42 million
---
OK
--------
b. What is the cost to remove 80 % of the pollutant?
C=5,000
300-3x
C=5,000
300-3(80)
C=5,000
300-240
C=5,000
60
C=$83 million
----
OK
------
c. What is the cost to remove 95% of the pollutant?
C=5,000
300-3x
C=5,000
300-3(95)
C=5,000
300-285
C=5,000
15
C=$333 million
---
OK
------
d. For what value is this equation undefined?
The equation is undefined when x=100, and that’s because the bottom of the fraction =0, at x=100.
300-3x
300-3x-3x-3x
x=100
----
OK
------------
Cheers,
Stan H.
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