Consider the 6 inch x9 inch rectangular cake that is 2 inches deep. If you cover the cake with frosting
excluding the bottom, what is the surface area of the cake that will be covered with frosting?
The surface area of a rectangular cake is given by the formula:
2(lw+lh+wh)
where l, w, and h are the length, width, and height of the cake respectively.
Substituting the given values, we get:
2(6*9+6*2+9*2) = 2(54+12+18) = 2(84) = 168
Therefore, the surface area of the cake that will be covered with frosting is 168 square inches.