Answer
13 units
Work Step by Step
We know that the distance $d$ between two points $(x_{1},y_{1})$ and $x_{2},y_{2})$ is given by $d=\sqrt ((x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2})$.
Therefore, the distance between $(2,3)$ and $(14,8)$ will be $d=\sqrt ((14-2)^{2}+(8-3)^{2})=\sqrt ((12)^{2}+(5)^{2})=\sqrt (144+25)=\sqrt 169=13$ units