What is the value of the expression?
5^-6 * 5^2 / 5^-8
a. 5^-20
b. 5^12
c. 5^4
d. 5^-4

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