Which expression is equivalent to -18a^-2 b^5/-12^-4 b^-6? assume a=0,b=0

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

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

50 points~ ! i have to turn this in tomarrow