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Quiz 7\quad Mar. 22/24, 1994\cr
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1. Calculate the area between the spirals $r = \theta$ and $r = 3\theta$ above
the $x$-axis.

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2.  Evaluate the integral $\iiint_D x\,dV$ over the solid region $D$ bounded
by the planes\hfil\break $x + y + z = 2$, $y = 0$, $y = x$, and $z = 0$.

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