Answer
The angle of elevation is $\approx 72^{\circ}$.
Work Step by Step
Use the cosine ratio to find the angle of elevation.
Let $x = $ the angle of elevation
$cos(x) = \frac{10}{32}$
by GDC / calculator
$x = 71.7900...^{\circ}$
$x \approx 72^{\circ}$
