Answer:
304 in²
Explanation:
You want the surface area of a rectangular prism with dimensions 4 in, 8 in, and 10 in.
Area
The area of a rectangular prism is given by the formula ...
A = 2(LW +H(L +W))
Using the given dimensions, the area is ...
A = 2(4·8 +10(4+8)) = 2(32 +120) = 304 . . . . square inches
The area of the box is 304 square inches.