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19 January, 01:50

Between 2005 and 2009 the average rate of inflation was about 2.2% per year. if a cart of groceries cost $120 in 2005, what did it cost in 2009?

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  1. 19 January, 01:55
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    In the problem it is already given that the average rate of inflation per year between 2005 and 2009 is 2.2%. the price of the product in 2005 is $120. It is required to find the rate of the product in the year 2009.

    In the year 2006 rate of increase of the product price = 120 * (2.2/100) dollars

    = 2.64

    Then price in 2006 = (120 + 2.64) dollars

    = 122.64 dollars

    In the year 2007 rate of increase of the product price = 122.64 * (2.2/100) dollars

    = 2.69 dollars

    Then price in 2007 = 125.34 dollars

    In the year 2008 rate of increase of the product price = 125.34 * (2.2/100)

    = 2.75 dollars

    Then price in 2008 = 128.09

    In the year 2009 rate of increase of the product price = 128.09 * (2.2/100) dollars

    = 2.82 dollars

    Then the price in 2009 = 130.91

    In the year 2009 the product cost $130.91
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