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17 September, 12:48

From 1970 to 1990 the consumer price index increased from 38.8 to 130.7. If a tube of toothpaste cost 0.77 in 1970 and the price of toothpaste increased at the same rate as the CPI from 1970 to 1990, how much did the price of a tube of toothpaste increase from 1970 to 1990

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  1. 17 September, 16:26
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    This is actually

    confusing
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