Use the formula SA equals 2 left parenthesis small script letter l w right parenthesis plus 2 left parenthesis wh right parenthesis plus 2 left parenthesis small script letter l h right parenthesis to find the surface area for a rectangular prism with the length small script letter l of 2.9 cm​, a width w of 1.12 cm​, and a height h of 7 cm.