What is the lengtg of jk

(40 points) i need some . an answer definition is appreciated as well.

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

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?