The rectangle on the right is 81 and the rectangle on the left is 24. I don't really know about the second one sorry, but I hope this helped.
7-6x you are multiplying what’s in the () then comparing like term
down 3 unit mean -3 outside root
right 2 unit mean -2 inside root,
so the answer is

Isn't it 1/8?
I hope this helped i think i just simplified xD
Answer:
25.12
Step-by-step explanation:
The formula of the circumference of a circle is: C = 2(pi)(r)
Plug in 3.14 for pi and 4 for the radius.
C = 2(3.14)(4)
Multiply.
C = 25.12