Write the following as expressions.
a. one-third the sum of 6 and 3.
b. four times the quotient of 3 and 4.
c. one-fourth the difference between 2/3 and 1/2.

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