Hector is buying books at a book store hue buys 2 used books and 1 new book for 26 dollars .the new book costs 18 dollars .each used book costs the same amount .what is the price of each used book ?

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π