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Rectangles that are 5×20, 6×12, or 8×8 will satisfy your criteria. The sum of the areas of those is 236 units².
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20×5 and 12×6 rectangles are also "cool", but their areas are not different from those already counted.
Answer:
C - He substituted incorrectly when calculating the constant of variation.
AB=DC because they have the same side lengths
