The distance of the point $(4, 3, 5)$ from the $y$-axis is

If the coordinates of points $A$ and $B$ are $(3, 4, 5)$ and $(-1, 3, -7)$ respectively,find the equation of the locus of point $P(x, y, z)$ such that $PA^2 - PB^2 + 2k^2 = 0$.

The point on the $X$-axis which is equidistant from $A\ (2, -5, 7)$ and $B\ (1, 3, 6)$ is . . . . . . .

Fill in the blanks:
The $x$-axis and $y$-axis taken together determine a plane known as........

How far apart are the points $(2,0,0)$ and $(-3,0,0)$?

The distance of the point $(1, 2, 3)$ from the $x$-axis is.......