The distance between the two points in 3-dimensional space can be obtained by
[tex]d=\sqrt[]{(x_2-x_1)^2+(y_2-y_1)^2+(z_2-z_1)^2}^{}_{}[/tex]Therefore,
Let the points be represented
A=(4,-2,9)
and
B=(-5,9,-3)
Therefore
If we substitute the values into the formula
[tex]\begin{gathered} d=\sqrt[]{(-5-4)^2+(9-(-2))^2+(-3-9)^2} \\ d=\sqrt[]{(-9)^2+(11)^2+(-12)^2} \\ d=\sqrt[]{81+121+144} \\ d=\sqrt[]{346} \\ d=18.601 \end{gathered}[/tex]