What is the difference between the areas of a circular table with diameter 6 ft and a circular table with diameter 8 ft?

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?

The measure of an angle is 117°. what is the measure of a supplementary angle?

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?