Find the most important variable the problem a bag of marbles is full with 20 marbles 12 of which are yellow how many are not yellow A. the number of yellow marbles B. the total number of marbles C. the number of marbles that are not yellow

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