How do you round off 199,814.rounding off the the 9 beside comma

Is this a polynomial function? i need to know asap

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

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