3 in.

9 in.
10 in.

What is the surface area of the rectangular prism?
___ square inches

The surface area of a rectangular prism can be calculated using the formula: 2lw + 2lh + 2wh, where l is the length, w is the width, and h is the height.

Given dimensions:
Length (l) = 10 in
Width (w) = 9 in
Height (h) = 3 in

Surface area = 2(10*9) + 2(10*3) + 2(9*3)
Surface area = 2(90) + 2(30) + 2(27)
Surface area = 180 + 60 + 54
Surface area = 294 square inches

Therefore, the surface area of the rectangular prism is 294 square inches.