Express the radical in simplified form. Assume that all variables represent positive real numbers.- 
A. -8xy
B. xy
C. -8xy
D. 8xy
Answer: C
Mathematics
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Solve the problem.Write (in the same base) the counting numbers just before and just after 68nine.
A. 66nine, 72nine B. 67nine, 71nine C. 67nine, 70nine D. 67nine, 101nine
Mathematics
Solve the problem.Find the center of mass of the region of constant density bounded by the paraboloid 
and the xy-plane.
A. 
= 0, 
= 0, 
= 3
B. 
= 0, 
= 0, 
= 12
C. 
= 0, 
= 0, 
= 2
D. 
= 0, 
= 0, 
= 18
Mathematics
Simplify. Leave your answer in exponent form.
3
A. 
B. 
C. 
D. 
Mathematics
Identify the expression as a polynomial or not a polynomial.0.4x8 - 6.8
A. Polynomial B. Not a polynomial
Mathematics