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11 August, 17:23

You buy a new computer for $2,100. the computer decreases by 50% annually. when will the computer have a value less than $100?

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  1. 11 August, 17:51
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    It should be after 5 years:

    2100:2=1050 (after 1 year)

    1050:2=525 (after 2 years)

    525:2 = 262.5 (after 3 years)

    262.5:2 = 131.25 (after 4 years)

    131.25:2 = 65.625 (after 5 years)
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