Explanation:
Use the tan ratio to find the horizontal distance.
[tex]\begin{gathered} \tan \theta=\frac{opposite\text{ side}}{\text{Adjacent side}} \\ \tan 30^{\circ}=\frac{6}{a} \\ a=\frac{6}{\frac{1}{\sqrt[]{3}}} \\ a=6\sqrt[]{3} \\ a=10.39 \\ a=10.4miles \end{gathered}[/tex]
Answer: option a) 10.4 miles
