Answer:
Step-by-step explanation:
D. 12 units
The distance between two points is found by
d = sqrt( (x2-x1)^2 + (y2-y1)^2)
sqrt( (4 -4)^2 + (-5-7)^2)
sqrt((0^2 + (-12)^2)
sqrt(0+144)
sqrt(144)
12
11-3i
6-7i+5+4i=6+5-7i+4i=11-3i