█ Explanation █
Let's call the missing altitude 'x'.
✦ To find the plane's altitude, find the tan of 30 degrees. The side opposite is going to be x, while the side adjacent is going to be 4.4 miles.
✦ [tex]Tan(30)= \frac{x}{4.4} [/tex]
✦ [tex] 5.7735= \frac{x}{4.4} [/tex]
✦ [tex]x=4.4*.57735[/tex]
✦ [tex]x=4.4*.55735[/tex]
✦ [tex]x=2.54 mi[/tex]
✦ We usually write altitude in feet.
Answer: 2.54 * 5280 ~ 13,400 ft
Hope that helps! ★ If you have further questions about this question or need more help, feel free to comment below or leave me a PM. -UnicornFudge aka Nadia