Which number line correctly shows -0.8 + 0.6

A.  

Step-by-step explanation:

This is because of the fact that the equation is -0.8+0.6.  It is A because 1) the line starts at the point -0.8, 2)  because it adds 0.6 to the negative 0.8 to get an answer of 0.2 :)

204 square meters

Step-by-step explanation:

The surface area of the 4 wall of the 1st prism is the product of perimeter and its height: (2+8)*2*2 = 40 m2

The surface area of the top and bottom of the 1st prism is the 2 times the product of its width and height: 2*8*2 = 32 m2

Therefore the total surface area of the 1st prism is: 40+32 = 72 m2

Similarly, the surface area of the 4 wall of the 2nd prism is the product of perimeter and its height: (2+3)*2*11 = 110 m2

The surface area of its top and bottom is: 2*3*2 = 12 m2

Therefore the total surface area of the 2nd prism is: 110 + 12 = 132 m2

Overall, the total surface area of the composite is 132 + 72 = 204 m2