Final answer:
The resultant speed of the airplane is approximately 622.86 mph and the resultant direction is approximately N 42.86° W.
Step-by-step explanation:
To find the resultant speed and direction of the airplane, we can use vector addition. We can break down the velocity of the airplane and wind into their respective components. The velocity of the airplane can be represented as 600 mph at an angle of N 40° W. The velocity of the wind can be represented as 80 mph at an angle of N 45° E. By adding the components of the airplane's velocity and the wind's velocity, we can find the resultant velocity. Using trigonometry, we can find that the resultant speed is approximately 622.86 mph and the resultant direction is approximately N 42.86° W. Therefore, the correct answer is A. Resultant speed: 622.86 mph, Resultant direction: N 42.86° W.