[All Steps] Here is a 2D region R whose left boundary is the curve \text left (y)= sin (3 y) and whose right boundary is the curve \text right (y)=4 sin
Question: Here is a 2D region \(\mathrm{R}\) whose left boundary is the curve
\[\text { left }(y)=\sin (3 y)\]and whose right boundary is the curve
\[\text { right }(\mathrm{y})=4 \sin (\mathrm{y})\]
Say why it's natural to calculate
\[\iint_{R} 1 d x d y\]by integrating with respect to \(x\) first.
Next, calculate
\[\iint_{R} 1 d x d y\]by hand and say what
\[\iint_{R} 1 d x d y\]measures.
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Deliverable: Word Document 