Is there supposed to be a picture?? I see nothing im sorry. But i can help u cause this is just surface area, quite easy. I will just give you the formula for surface area of a RECTANGULAR prism: 2 ( width x length + height x length + height x width) or just : 2 (wl + hl + hw)
The "divisor" in synthetic division is most conveniently the value of the zero of the binomial term. Here, that is x=5. You also need to make sure you include all of the coefficients in the "dividend", putting zero where terms are missing.