the formula of the area of a rectangle is
[tex]A=b\times h[/tex]on this case
[tex]A=4\times16[/tex]we can Use the break apart and distribute strategy to simplify
[tex]\begin{gathered} A=4\times(10+6) \\ A=4\times10+4\times6 \\ A=40+24 \\ A=64 \end{gathered}[/tex]the area is 64 square ft
