Verified answer

This equation forms a right triangle, because the transition from 136 degrees to 226 degrees is a 90 degree angle. One leg of the triangle is 150 miles (300 mi/hr x 0.5 hours); the other is 225 (300 mi/hr x .75 hours). To find the distance from A, or the hypotenuse, use the equation a^2 + b^2= c^2. So 22,500 + 50,625 = c^2, 73125 = c^2, and c = about 270 miles

So the answer would be 270 miles.

Hope this makes sense.