Step-by-step explanation:
The figure shows the arrangement.
Angle of flight with ground = 12°
We have
[tex]tan12=\frac{BC}{AB}[/tex]
We know
BC = Altitude = 500 feet
AB = Horizontal distance traveled.
Substituting
[tex]tan12=\frac{500}{AB}\\\\B=2352.32ft[/tex]
Horizontal distance traveled by airplane is 2352.32 ft