Many stores sell items at a percentage discount (discount rate). The sale price is the original price minus the discount . Find the discount and the sale price.

the formula for the equation of a circle is (x – h)2+ (y – k)2 = r2, where (h, k) represents the coordinates of the center of the circle, and r represents the radius of the circle. if a circle is tangent to the x-axis at (3,0), this means it touches the x-axis at that point.

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.

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