The surface area of the rectangular prism is
[tex]A=2\lbrack l\times w+l\times h+w\times h\rbrack[/tex]l = 9 cm
w = 5 cm
h = 8 cm
Substitute them in the rule above
[tex]\begin{gathered} A=2\lbrack9\times5+9\times8+5\times8\rbrack \\ A=2\lbrack45+72+40\rbrack \\ A=2\times157 \\ A=314 \end{gathered}[/tex]The surface area is 314 cm^2
