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emhart2012

  • 2 years ago

A telephone company charges customers a certain amount for the first minute of a long distance call and another amount for each additional minute. A customer makes two calls to the same city—a 31-minute call for $1.94 and a 13-minute call for $0.86. If there is a federal tax rate of 3.7% and a state tax rate of 7.4% on all long distance calls, find, to the nearest minute, the longest call to the same city whose cost will not exceed $9.00.

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  1. emhart2012
    • 2 years ago
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    for the first half of the problem i got .14 for the cost of the first minute and then .06 for the additional minutes.. i need help solving the last question about the federal tax

  2. xon1300
    • 2 years ago
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    I'd say add the taxes together 3.7+7.4 = 11.1% then the equation becomes y = (11.1/100)*( 0.14 + 0.6(m-1) ) does that work?

  3. emhart2012
    • 2 years ago
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    am i soppose to solve for m? or y?

  4. emhart2012
    • 2 years ago
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    im confused and its .06

  5. xon1300
    • 2 years ago
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    you solve for m (mintute) given that y (money) equals $9

  6. geoffb
    • 2 years ago
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    @xon1300 In your formula, \(y\) would only be the tax. It wouldn't include the cost of the call.

  7. xon1300
    • 2 years ago
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    so \[y = (111.1/100)*( 0.14 + 0.06(m-1) )\] when y=9 m= what?

  8. geoffb
    • 2 years ago
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    There, that one's better. :)

  9. xon1300
    • 2 years ago
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    hard to count ones, they marge together, lol

  10. geoffb
    • 2 years ago
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    Haha yeah!

  11. emhart2012
    • 2 years ago
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    Thank you so much!! thats the same thing i did and thats why i couldn't figure it out i hade 11.1

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