Final answer:
The measure of x in degrees is 20.
Step-by-step explanation:
The measure of x in degrees is b. 20. To determine the measure of x, we need to consider the vector components. The x-component of a vector with an angle greater than its y-component will always be greater.
Since the angle in this question is 40°, which is less than 45°, the x-component will be greater than the y-component. Therefore, the measure of x is 20°.