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ALGEBRA

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1. The cost, in millions of dollars, to remove x % of pollution in a lake modeled by C = __6,000__ (all supposed to be underlined)
300-3x

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

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

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

d. For what value is this equation undefined?

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

  • ALGEBRA - ,

    Type divisions this way ...
    C = 6000/(300-x)

    a) replace x with 75
    C = 6000/(300-3(75))
    = 6000/75 = 80

    b) you try it, should get 200
    c) should be really high

    d) what happens when x = 100 ?

  • ALGEBRA - ,

    For A...I have 80million
    B...200million
    C...58 million

  • ALGEBRA - ,

    c)
    C = 6000/(300 - 3(99))
    = 6000/3
    = 2000 million

  • ALGEBRA - ,

    ok i did it like this:
    6000/(300-3*99)
    oh!!! never mind got it now..thank you!!!!

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