Solve the problem.Integrate 
over the region 0 ? x2 + y2 ? 49.
A. 28?(ln 7 - 1)
B. 14?(ln 7 - 1)
C. 14?(2 ln 7 - 1)
D. 28?(2 ln 7 - 1)
Answer: A
Mathematics
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Find the center of mass of a thin plate covering the given region with the given density function.The region between the curve y = 
and the x-axis from x = 1 to x = 9, with density ?(x) = 
A. 
= 
, 
= 
B. 
= 
, 
= 1
C. 
= 5, 
= 2
D. 
= 
, 
= 24
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Find the sum of the series, if possible.
A. Not possible, infinite B. -2460 C. 69 D. -732
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Evaluate the exponential function at the specified value of x.f(x) = 243x, x = -0.2
A. 9
B. 
C. -3
D. 3
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Write the following proportions.$36 is to 32 bottles as $63 is to 56 bottles
A. 
= 
B. 
= 
C. 
= 
D. 
= 
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