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17 January, 09:34

You purchase a cell phone for $125. the value of the cell phone decreases by about 20% annually. write a function at models the value of the cell phone overtime. then find the value of the cell phone after three years

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  1. 17 January, 13:28
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    F (x) = 125 - (125*0.2x)

    to find the value of the phone after 3 years, you put x=3.

    f (3) = 125 - (125*0.2 (3))

    f (3) = 50
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