Ineed i need on number 19 20 22 18

Find the area of the unshaded square

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex