John pays $81.30 (not including tax) for 6 reading books that are on sale. Each book costs the same amount. The amount he pays, is 3 7 of the original cost of the books. a) Write an equation to solve for the price of one book (b) on sale, then solve for b. b) Write an equation to solve for the original cost (t) of each book, then solve for t.
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Some species of caterpillar have 4,000 muscles in their body. Compare that to the human muscular system, which is made up of only 639.
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