[tex] \sqrt{ {(x2 - x1)}^{2} + ( {y2 - y1)}^{2}}[/tex]
[tex] \sqrt{ {(5 - 7)}^{2} + {( - 4 - 8)}^{2} } [/tex]
[tex] \sqrt{ {( - 2)}^{2} + {( - 12)}^{2} } [/tex]
[tex] \sqrt{4 + 144} [/tex]
[tex] \sqrt{148} [/tex]
[tex]2 \sqrt{37} [/tex]
the nearest 10 place is 10.
hence the distance is 10 units