math
posted by Taylor .
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?

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?