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

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.

The students in a class were asked how many siblings they have. the data obtained is represented in the dot plot. the number of students who have no siblings is . the number of students who have three or more siblings is .