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\textbf{Math 225: Calculus III}
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\textbf{Quiz 7}\quad \textsl{Mar.\ 28/30, 1995}
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\item 
 Find the centroid of the region bounded above by $y = x^{1/5}$ and below by
$y = x^3$ for $0 \le x \le 1$.
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\item 
Find the mass of the solid bounded above by $z = 8 - x^2 - y^2$ and below by 
$z = x^2 + y^2$ if the density function is $\delta(x,y,z) = 8 - z$.
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