A rectangle has a base of 8 yards and a height of 12.1 yards. What is the area?

Length times width equals area of a rectangle.
8*12.1=96.8

96.8 sq yards

X^2 - 4x +(4/2^2) + y^2 + 8y + (8/2^2) = -4 + (4/2^2) + (8/2^2)(x + 2)^2 + (y + 4)^2 = -4 + 4 + 16your center is (-2, -4) and the radius is the sqrt of -4 + 4 + 16 which is 4