# math

posted by .

The cost in millions of dollars, to remove x%of pollution in a lake is mideled by C=6.000/200-2x. 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 -

Whenever there is a division, insert parentheses to indicate the beginning and the end of the denominator, for example:
C=6.000/200-2x
is not the same as:
C=6.00/(200-2x)
I believe the expression supplied was the latter.
A. 80%
C=6.00/(200-2*80)=6/40=0.15 M\$
B. When the denominator becomes zero, the expression for the cost is undefined.
If the denominator is (200-2x), when it becomes zero, then
(200-2x)=0
Solve for x.
When the expression is undefined, what does it mean in everyday terms?

## Similar Questions

1. ### Algebra

The cost, in millions of dollars, to remove x% of pollution in a lake modeled by C=6,000/200-2x What is the cost to remove 75% of the pollutant?
2. ### Algebra 2

Are these correct...Please help 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?
3. ### math

The cost, in millions of dollars to remove x% of pollution modeled by c=6000/200-2x. A) what is the cost to remove 75% of the pollutant?
4. ### ALGEBRA

1. The cost, in millions of dollars, to remove x % of pollution in a lake modeled by C = __6,000__ (all supposed to be underlined) 300-3x a. What is the cost to remove 75% of the pollutant?
5. ### math

The cost in millions of dollars, to remove x%of pollution in a lake is mideled by C=6.000/200-2x. A.) What is the cost to remove 80% of the pollutant?
6. ### Algebra

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?
7. ### Algebra

The cost, in millions of dollars, to remove x % of pollution in a lake modeled by C=4,000/200-2x What is the cost to remove 65% of the pollutant?