If $M$ and $N$ are the points $(-3,8)$ and $(5,-7)$ respectively, find $MN$.

We are told to find the distance between points $M$ and $N$. The distance between two points $(x_1, y_1)$ and $(x_2, y_2)$ on the x-y plane is $\sqrt{(x_1-y_2)^2+(x_2-y_2)^2}$. The distance between the two points $M$ and $N$ will be