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MathematicsMathematics
28 March, 14:23

Between 2005 and 2008 , the average rate of inflation was about 4.6 % per year. If a cart of groceries cost $110 in 2005, what did it cost in 2008?

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  1. 28 March, 16:05
    0
    We can use the compound (interest) formula: A = P x (1 + r/100) ^n

    Where A is our final cost, P is our original price in 2005 = $110, r is our inflation rate = 4.6, and n is our number of years from 2005 to 2008 = 3.

    Apply this to the formula: A = 110 x (1 + 4.6/100) ^3 = $125.8889 = $126.

    The cart of groceries cost a total of $126 in 2008.
  2. 28 March, 16:37
    0
    The answer is 492.52016
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