What is the value of the expression below? 3 ( 4 to the power of 2 + 1 ) - 2 to the power of 3 A
21

B
43

C
45

D
12

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