Posted by **Anonymous** on Saturday, January 22, 2011 at 4:38pm.

Did I do this right?

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?

I got $3,022,670,025

- Algebra -
**Ms. Sue**, Saturday, January 22, 2011 at 4:41pm
Did you leave out some information?

- Algebra -
**helper**, Saturday, January 22, 2011 at 4:42pm
Re-check your problem. I think you are missing a part here.

pollution in a lake modeled by ?

- Algebra -
**Anonymous**, Saturday, January 22, 2011 at 4:50pm
sorry it didn't paste the formula.. lets try again....

1. The cost, in millions of dollars, to remove x % of pollution in a lake modeled by C=6000/(200-2x)

a. What is the cost to remove 75% of the pollutant?

I got $3,022,670,025

- Algebra -
**helper**, Saturday, January 22, 2011 at 5:27pm
C = 6000/(200 - 2x)

C = 6000/(200 - 2(75))

C = 6000/(200 - 150)

C = 6000/50

C = 120 mil

120,000,000 million

or, is it

C = 6000/(200 - 2(.75))

C = 6000/(200 - 1.5)

C = 6000/198.5

C = 30.2267 mil

30,226,700 million

I think it's the first, but I am not a tutor

- Algebra -
**Anonymous**, Saturday, January 22, 2011 at 5:36pm
Thank you.. I too got both those answers.. at least the second answer you got to an extent.. not sure which is correct myself.

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