Answer:
Option b) 8x²+34; 45.52 centimeters
Step-by-step explanation:
Length of the sandwich is = 2x²+8 centimeters
Breadth of the sandwich = 2x²+9 centimeters
Therefore total perimeter of the sandwich = 2(length + breadth)
                     = 2 (2x²+8+2x²+9) centimeters
                     = 2( 4x²+17) centimeters
                     = (8x² +34) centimeters
If x = 1.2 then perimeter of the sandwich = [tex]2(4(1.2)^{2}+17)[/tex]
                                  = 2(4×1.44+17) = 2(5.76+17)
                                  = 2×22.76 = 45.52 centimeters
So the answer is option b) 8x²+34; 45.52 centimeters
