What is the surface area of the rectangular prism?

348 in.² is the answer.

Step-by-step explanation:

To find our answer we will multiply each number by each other.

6 x 8 = 48

6 x 9 = 54

8 x 9 = 72

Now we have our numbers 48, 54, and 72, we will multiply each one by 2.  

48 x 2 = 96

54 x 2 = 108

72 x 2 = 144

For our final step we will add all these together to find our surface area.  96 + 108 + 144 = 348.  Therefore, 248 in² is our answer.