Solve.Find the centroid of the region bounded by the x-axis and the curve y = 3 sin x, 0 ? x ? ?.
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= ?, 
= 
Answer: B
Mathematics
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Find the surface area or volume.Use an integral table and a calculator to find to two decimal places the area of the surface generated by revolving the curve 
about the x-axis.
A. 40.67 B. 57.04 C. 69.72 D. 81.33
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Determine the limit by sketching an appropriate graph.
f(x), where f(x) = 
A. -10 B. 4 C. 27 D. 3
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Evaluate the integral.
dx
A. 
sin 2x + 
sin3 2x + C
B. 
sin 2x - 
sin3 2x + C
C. 5 sin 2x - 
sin3 2x + C
D. 
sin 2x - 
cos3 2x + C
Mathematics
Change the decimals to their fraction or mixed-number equivalents, and reduce answers to lowest terms.0.875
A. 
B. 
C. 
D. 
Mathematics