A wall mosaic is being designed. The tiles for the wall make a rectangular grid consisting of mºrows and m columns. Which expression shows the number of tiles on the wall?
[tex]m {8}^{?} [/tex]
[tex]2 {m}^{3} + 2 {m}^{5} [/tex]
[tex] {m}^{3} + {m}^{5} [/tex]
[tex] {m}^{15} [/tex]
