What is the missing length of a rectangular prism if height and width are both 8 inches. And surface area is 256 in^2 o find the missing length of the rectangular prism, we can use the formula for the surface area of a rectangular prism, which is 2(hw + hl + lw), where h is the height, w is the width, and l is the length. can you show your work and wrote it like a 7th grader wrote it.

To find the missing length of a rectangular prism, we can use the formula for surface area: 2(hw + hl + lw). Given that the height and width are both 8 inches, and the surface area is 256 in^2, we can plug in the values and solve for the missing length.

Surface area = 2(8*8 + 8*l + 8*l)
256 = 2(64 + 16l)
256 = 128 + 32l
128 = 32l
l = 4 inches

So, the missing length of the rectangular prism is 4 inches.