I need help I am having trouble finding the answer ole a she help

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

Sum of the interior angles of a pentagon

Solve 4 ln x=2ln25 a) x=5 b) x=25 c) x=625