Answer :
The formula of the area of a trapezoid is
[tex]A=\frac{(B+b)\cdot h}{2}[/tex]where
B and b are the bases and the height is h
in our case we have
B= 8in
b=5 in
h=4 in
we substitute the values in the formula
[tex]A=\frac{(8+5)\cdot4}{2}=26in^2[/tex]