Group the figures into classes so that all the elements within each class are topologically equivalent, and no elements from different classes are topologically equivalent.
A. A; B and C; D
B. A and C; B; D
C. A and B; C; D
D. A and D; B; C
E. B and C; B; D
Answer: A
Mathematics
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Find the volume of the solid generated by revolving the region R bounded by the graphs of the given equations about the 
.y = 
, y = -x + 6
A. 20?
B. 16?
C. 
?
D. 72?
Mathematics
Solve the problem.The positions of two particles on the s-axis are s1 = sin t and 
with s1 and s2 in meters and t in seconds.At what time(s) in the interval 0 ? t ? 2? do the particles meet?
A. t = 
? sec and t = 
? sec
B. t = 
? sec and t = 
? sec
C. t = 
? sec and t = 
? sec
D. t = ? sec and t = 2? sec
Mathematics
Find the volume of the indicated region.The solid cut from the first octant by the surface 
A. 
B. 
C. 
D. 
Mathematics
Find the LCM of the set of numbers.30, 121
A. 4356 B. 726 C. 3630 D. 18,150
Mathematics