Posted by **becca** on Wednesday, December 14, 2011 at 12:45pm.

The cost, in millions, to remove x% of pollution in a pond is modeled by the equation: C=6350/(425-3x)

What is the cost to remove 75% of the pollution? Plug in and calculate, do not convert to a decimal.

- Algebra -
**becca**, Wednesday, December 14, 2011 at 2:06pm
, 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

- Algebra -
**Reiny**, Wednesday, December 14, 2011 at 2:35pm
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

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