Solve the problem.The shape and density of a thin shell are indicated below. Find the coordinates of the center of mass.Shell: cylinder x2 + z2 = 49 bounded by y = 0 and y = 10Density: constant
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Use the imaginary unit to write the expression.
A. 2
B. -2i
C. 2i
D. -2
Mathematics
Solve the problem.A surveyor measured the length of a piece of land at 100-ft intervals (x), as shown in the table. Use Simpson's Rule to estimate the area of the piece of land in square feet.
A. 29,500 ft2 B. 24,000 ft2 C. 24,500 ft2 D. 25,000 ft2
Mathematics
Refer to the figure to classify the statement as true or false.
and 
are perpendicular to the plane BEF.
A. True B. False
Mathematics
Solve.x4 - 49x2 + 180 = 0
A. ±3, ±3
B. ±2, ±3
C. ±2, ±3
D. ±2, ±
Mathematics