What does a data distribute look like if it's MAD equals zero

If jaime wants to find 60% of 320, which table should he use?

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

The area of a circle is equal to 1 dm². find the radius of the circle.