Chapter 11 - Section 11.1 - Sequences - Exercise Set - Page 640: 54

$d=\sqrt{34} \text{ units} $

Using the Distance Formula, $d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}$, the distance between $ (10,-14) \text{ and } (5,-11) $ is \begin{array}{l} d=\sqrt{(10-5)^2+(-14-(-11))^2} \\\\ d=\sqrt{25+9} \\\\ d=\sqrt{34} \text{ units} .\end{array}