For this case we have that by definition, the arc length of a circle is given by:
[tex]AL = \frac {x * 2 \pi * r} {360}[/tex]
Where:
x: Represents the angle between JM. According to the figure we have that x = 90 degrees.
[tex]r = \frac {16.4} {2} = 8.2[/tex]
So:
[tex]AL = \frac {90 * 2 \pi * 8.2} {360}\\AL = \frac {90 * 2 * 3.14 * 8.2} {360}\\AL = 12.874[/tex]
Rounding:
[tex]AL = 12.9[/tex] miles
Answer:
12.9 miles
