In the picture Up top, figure ABCDE has been dilated from a center point O. If |OA| is 5 and |OA'| = 10, what is the scale factor?

(A.) 1/2

(B.) 2

(C.) 5

(D.) 1/5

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm