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If one is trying to tile a square room which has a length of L with the same tile, the cost of the tile is given by P cL2 in dollars where c is a constant. Suppose the cost to tile five, equally sized square rooms is 1750 dollars. If the length of each one of these rooms is reduced by a factor of 2.8, how much less (not the new cost... how much less) does it cost to tile all five rooms now in dollars?

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