Find the area of the surface generated by revolving the curves about the indicated axis.x = 4 + cos t, y = sin t, 0 ? t ? 2?; y-axis
A. 12?2
B. 4?2
C. 16?2
D. 24?2
Answer: C
Mathematics
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Evaluate the integral.
A. 
?2
B. 
?2
C. 
?
D. 
?
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Determine whether the form represents a valid argument.~p q ? ~p~p ? q
A. Invalid B. Valid
Mathematics
Name the property used to go from step to step indicated by an a), b), c), or d).
What will be an ideal response?
Mathematics
Use the change of base rule to find the logarithm to four decimal places.log2.8 154
A. 0.2044 B. 2.1875 C. 55.0000 D. 4.8921
Mathematics