Answer
Distance: $5$
Midpoint: $M(-6; \frac{11}{2})$
Work Step by Step
The distance between two points can be calculated by the distance formula:
$d=\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2}$
$d=\sqrt{(-6-(-6))^2+(8-3)^2}
\\d=\sqrt{(0+25)}
\\d=\sqrt{25}
\\d=5$
The midpoint can be calculated by the average of the x and y coordinates of the two points.
$M(\frac{-6-6}{2};\frac{8+3}{2})= (-\frac{12}{2};\frac{11}{2})=(-6, \frac{11}{2})$
