Answer:
27.6°
Explanation:
It can help to draw a diagram.
The angle of interest is the angle in a right triangle that has 23 ft as its adjacent side and 12 ft as its opposite side. The tangent relation is helpful:
Tan = Opposite/Adjacent
tan(d) = 12/23
The inverse tangent function is used to find the angle when you know the tangent:
d = arctan(12/23) ≈ 27.55°
The angle of depression is about 27.6°.