Help me with thank u sm ❤️❤️

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

For what value of (y) is 3^3/3^y =1/9

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