Using the slope concept, it is found that the height of the drone is of about 94 feet.
The slope is given by the vertical change divided by the horizontal change, and it's also the tangent of the angle of depression.
In this problem:
Hence:
[tex]\tan{23^\circ} = \frac{h - 5}{210}[/tex]
[tex]h - 5 = 89[/tex]
[tex]h = 94[/tex]
The height of the drone is of about 94 feet.
More can be learned about the slope concept at https://brainly.com/question/18090623