At a certain industrial manufacturer, an open tank contains $6\%$ fluorine dissolved in water. If the tank holds

At a certain industrial manufacturer, an open tank contains $6\%$ fluorine dissolved in water. If the tank holds $1000$ gallons, and $10$ gallons of the total volume evaporate as water each day, what is the concentration of fluorine after $25$ days?

A. $4\%$
B. $6\%$
C. $8\%$
D. $10\%$
E. $15\%$

Answer: C

Source: Veritas Prep

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