The solution would be like
this for this specific problem:
<span>7 x 30 = 210 </span>
<span>210 + 55(2) = 320
</span>
<span> </span>
<span>
</span><span>T</span><span>he surface area of the prism is 320 mm2.</span>
The correct answer between all
the choices given is the second choice or letter B. I am hoping that this
answer has satisfied your query and it will be able to help you in your
endeavor, and if you would like, feel free to ask another question.