Chapter F - Foundations: A Prelude to Functions - Section F.1 The Distance and Midpoint Formulas - F.1 Assess Your Understanding - Page 7: 24

$5\sqrt 5$ units

To calculate the distance $d$ between two points, we have: $d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$ Substitute the $x$ and $y$-coordinates of the given points to obtain: $d=\sqrt{[6-(-4)]^2+[2-(-3)]^2}\\ d=\sqrt{10^2+5^2}\\ d=\sqrt {100+25}\\ d=\sqrt{125}\\ d=\sqrt{(25)(5)}\\ d=5\sqrt 5$