Answer
$ 5^{\circ}$
Work Step by Step
In the figure Illustration 5 is a right angle triangle.
Let the angle of inclination is $\theta$.
One leg is $a=220\;ft$.
Second leg is $b=2300\; ft$.
By using trigonometric ratios.
$\tan{\theta}=\frac{220\;ft}{2300\;ft}$
Isolate $\theta$.
$\theta =\tan^{-1}{\left ( \frac{220\;ft}{2300\;ft}\right )}$
Simplify.
$\theta = 5^{\circ}$ (rounded value.).
