Posted by **Help Please** on Friday, April 4, 2008 at 12:59pm.

Are these correct...Please help

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?

C=6,000/(200-2X)

C=6,000/(200-2*.75))

C=6,000/(200-1.5)

C=6,000/198.5

C=30.23 Million for 75% removal.

b. What is the cost to remove 90 % of the pollutant?

C=6,000/(200-2*.9)

C=6,000/200-1.8)

C=6,000/198.2

C=30.27 Million for 90% removal.

c. What is the cost to remove 99% of the pollutant?

C=6,000/(200-2*.99)

C=6,000/(200-1.98)

C=6,000/198.02

C=30.30 Million for 99% removal.

I need help with the last two.

d. For what value is this equation undefined?

e. Do the answers to sections a–d match your expectations? Why or why not?

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