Posted by Taylor on Saturday, June 19, 2010 at 9:51pm.
The cost in millions of dollars, to remove x%of pollution in a lake is mideled by C=6.000/2002x. A.) What is the cost to remove 80% of the pollutant? Remember that the cost is in millions of dollars. B.) For what value is the equation undefined? What does your answer mean?

parentheses needed  MathMate, Sunday, June 20, 2010 at 9:57am
Whenever there is a division, insert parentheses to indicate the beginning and the end of the denominator, for example:
C=6.000/2002x
is not the same as:
C=6.00/(2002x)
I believe the expression supplied was the latter.
A. 80%
C=6.00/(2002*80)=6/40=0.15 M$
B. When the denominator becomes zero, the expression for the cost is undefined.
If the denominator is (2002x), when it becomes zero, then
(2002x)=0
Solve for x.
When the expression is undefined, what does it mean in everyday terms?
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