R

The region R is bounded by the yaxis and the two lines. Then

$\displaystyle\int\int_Rf(x,y)dA=$

$\displaystyle\int$

$\displaystyle\int$

$f(x,y) dydx$

and

$\displaystyle\int\int_Rf(x,y)dA=$

$\displaystyle\int$

$\displaystyle\int$

$f(x,y)dxdy$

Note: $y=8$ on the top of the triangle.