# Algebra

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The cost, in millions, to remove x% of pollution in a pond is modeled by the equation:

.

What is the cost to remove 75% of the pollution?

Hint: Plug in and calculate, do not convert to a decimal.

• Algebra -

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.

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