Molly and Liza are exercising. Molly does 10 push -ups at the same time as Liza does 15 push -ups . When Molly does 40 push - ups , how many push - ups does Liza do ?

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