Answer: [tex]1077.18\ ft[/tex]
Step-by-step explanation:
Given
height of the tower is 350 ft
the angle of depression is [tex]\theta =18^{\circ}[/tex]
from the figure, we can write
[tex]\Rightarrow \tan \theta =\dfrac{h}{x}\\\\\Rightarrow \tan 18^{\circ}=\dfrac{350}{x}\\\\\Rightarrow x=\dfrac{350}{\tan 18^{\circ}}=1077.18\ ft[/tex]