Chapter 11 - Section 11.1 - Sequences - Exercise Set - Page 640: 53

$d=\sqrt{41} \text{ units} $

Using the Distance Formula, $d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}$, the distance between $ (2,-7) \text{ and } (-3,-3) $ is \begin{array}{l} d=\sqrt{(2-(-3))^2+(-7-(-3))^2} \\\\ d=\sqrt{25+16} \\\\ d=\sqrt{41} \text{ units} .\end{array}