Find the missing dimension. use the scale factor 1 : 12. fill in the |_|!

item model actual

mattress length: 6.25 in. length: |_| in.

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