Algebra
posted by becca on .
The cost, in millions, to remove x% of pollution in a pond is modeled by the equation: C=6350/(4253x)
What is the cost to remove 75% of the pollution? Plug in and calculate, do not convert to a decimal.

, what value of x would make the equation undefined?
Hint: Think about what makes an equation undefined. Then calculate what value would make this equation undefined.
Any ideas????? help 
obviously the denominator cannot be zero.
That would happen when 425  3x= 0 or when x = .75
cost = 6350/(425  3(.25)) = 14.967
it would cost about 15 million