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vera_ewing

  • one year ago

Given an exponential function for compounding interest, A(x) = P(.82)^x, what is the rate of change? A. –18% B. –8% C. 0.82% D. 82%

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  1. vera_ewing
    • one year ago
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    @welshfella 82%?

  2. welshfella
    • one year ago
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    No - i think as the principal is decreasing Rate of change = 100-82 = -18% Not absolutely sure though

  3. vera_ewing
    • one year ago
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    @sdfgsdfgs It's -18?

  4. welshfella
    • one year ago
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    yes you'd better check

  5. amoodarya
    • one year ago
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    \[a(x)=p*(1+r)^n\]

  6. sdfgsdfgs
    • one year ago
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    the prob is not clear: "rate of change" is not uniform for an exponential function... http://www.regentsprep.org/regents/math/algebra/AE7/ExpDecayL.htm if it is asking for "growth rate", then @welshfella is right on -18%.

  7. vera_ewing
    • one year ago
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    And if it's not asking for "growth rate" then would the answer be different?

  8. sdfgsdfgs
    • one year ago
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    then there be no ans :P

  9. vera_ewing
    • one year ago
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    Okay. Thanks!

  10. sdfgsdfgs
    • one year ago
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    welcome

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