Answer: Option A.
Step-by-step explanation:
The surface area of a right rectangular prism can be calculated with this formula:
[tex]SA = 2(wl + lh + hw)[/tex]
Where "w" is the width. "l" is the lenght and "h" is the height.
We know that:
[tex]w=6in\\l=9in\\h=18in[/tex]
Knowing this values, we can substitute them into the formula.
Therefore we get that the surface area of a right rectangular prism is this:
[tex]SA = 2[(6in)(9in) + (9in)(18in) +(18in)(6in)][/tex]
[tex]SA=648in^2[/tex]
This matches with the option A.
