.Which is larger? ½ of 280or⅜ of 400

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

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

What is the sum of these mixed numbers 4 2/3+ 3 1/9