Let us find the slopes of the two lines
ax+by=c, slope m1 = -a/b
bx-ay=c, slope m2 = b/a
m1*m2 = (-a/b)(b/a) = -1
Therefore the two lines are perpendicular so the answer is D
Answer:
I think its C) 43. Let me know what you get
diameter of human hair is around 0.0025cm
in scientific notation it is: 2.5x10^-3
