The percent increase in the price index from 1960 to 1970
is:
% increase in price index = (38.8 – 29.6) * 100% / 29.6
% increase in price index = 31.08%
Therefore the price of a dozen tangerines in 1970 (X) is:
31.08 = (X - $0.31) * 100 / $0.31
X =
$0.41
Sorry but I don’t quite get your problem. But if it’s just 8x2y4xy the answer would be 64x^2y^2
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