The volume of a triangular prism is increased by a factor of 8. By what factor is the surface area of the figure increased?

For a prism enlarged proportionally, volume changes by the cube of the linear scale factor. Since 8 = 2³, the dimensions are scaled by a factor of 2. Surface area changes by the square of the linear scale factor, so it increases by 2² = 4; the correct choice is 4.

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