In the process of laying out the question, you have given us important facts about the shaded area and the unshaded area. Now step back for just a second. If they're that deeply involved in the question, do you honestly expect that anybody can answer the question without seeing the picture of them ? ! ?
12.

The answer would most likely be 5.11 or 11.5
Answer:
The constant of proportionality in the equation y=0.41 is 0.41
Step-by-step explanation: