Math Question for An assignment

Evaluate the expression. (9 + 5)(3 + 2)0

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) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25