(3) in the following circle and rectangle, when ab (the length of segment ab) is 3, bc is 3, and de is 2.5, find the length of ef.
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Several paint mixtures are made by mixing blue paint and white paint. paint colors blue paint white paint mixture a 5 cups 12 cups mixture b 6 cups 6 cups mixture c 4 cups 12 cups mixture d 5 cups 6 cups which mixture has the highest ratio of blue paint to white paint