Final answer:
To convert 73 degrees S of W to the counter clockwise from east convention, subtract 73° from 180° to get 107°.
Step-by-step explanation:
To convert 73 degrees S of W to the counter clockwise from east convention, we need to subtract the given angle from 180°. This is because the counter clockwise convention measures angles from the positive x-axis (east) and the given angle is measured clockwise from the negative x-axis (west).
So, 180° - 73° = 107°.