A variable's data set has a normal distribution with a mean of 32.25 and a standard deviation of 3.6. What are the values one standard deviation above and below the mean?
3.6, 32.25
3.6, 35.85
28.65, 32.25
28.65, 35.85

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