Question 144634
Find the angles of the triangle formed by A, B and the fire.  The angle at A is 110 degs, the angle at B is 30 degs, and the angle at the fire is 30 degs.
Using the law of sines, 45/sin(40) = x/(sin(30).
x = 45(sin(30))/sin(40)
x = 35.0038 miles.