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18 May, 18:02

A farm increases in value from $800,000 to $1,100,000 over a period of 6 years. use the formula r = (fp) 1/n-1r = (fp) 1/n-1 to find the annual inflation rate rr to the nearest tenth of a percent, where nn is the number of years during which the value increases from pp to ff.

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  1. 18 May, 18:08
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    Future value is given by;

    f = p (1+r) ^n

    f = future value = $1,100,00

    p = present value = $800,000

    r = inflation rate

    n = number of years in which the vale increases from p to f = 6

    Therefore,

    1,100,000 = 800,000 (1+r) ^6

    1100000/800000 = (1+r) ^6

    1.375 = (1+r) ^6

    log (1.375) = 6 log (1+r)

    [log (1.375) ]/6 = log (1+r)

    0.0231 = log (1+r)

    e^0.0231 = 1+r

    1.0545 = 1+r

    r = 1.0545 - 1 = 0.0545 = 5.45%

    The rate of inflation is 5.45%.
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