What would 672,831 be rounded to the nearest ten

(hurry! ) which expression is equivalent to the following complex fraction?

What is the result of converting 60 ounces to pounds remember there are 16 ounces in a pound

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