12.03 feet is the right answer.
Answer:

Step-by-step explanation:
<u>Step 1: Determine the area of the bottom rectangle</u>



<u>Step 2: Determine the area of the back rectangle</u>



<u>Step 3: Determine the area of the top rectangle</u>



<u>Step 4: Determine the area of the triangle</u>




<u>Step 5: Determine the surface area</u>


Answer: 
you have to show us the circle mate???
39 because 6/3= 2 and 78/39 also = 2
85% of 690 lbs would be 586.5