Answer: option b
Step by step explanation; surface area is the value that expresses the amount of area you can touch on a figure
Since there's four triangular faces, you do 4*(1/2*8*15)
Since there's one square face, you do (8*8)
Together, you expression is (8 * 8) + 4 *(1/2 * 8 * 15)
Which is 394
