check the picture below.
make sure your calculator is in Degree mode.
now, "x" is just how many feet it is away, how many miles is that?
well, we know that there are 5280 feet in 1 mile, so
[tex]\bf x=\stackrel{in~feet}{\cfrac{950}{tan(5^o)}}\qquad \qquad\qquad \qquad \qquad x=\stackrel{in~miles}{\cfrac{\quad \frac{950}{tan(5^o)}\quad }{5280}}[/tex]