Express as a single logarithm and, if possible, simplify.logb a - logb y
A. logb 
B. logb 
C. logb a - y
D. log2b 
Answer: B
Mathematics
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Solve the problem.Find the center of mass of the region of density 
bounded by the paraboloid 
and the xy-plane.
A. 
= 0, 
= 0, 
= 
B. 
= 0, 
= 0, 
= 
C. 
= 0, 
= 0, 
= 10
D. 
= 0, 
= 0, 
= 5
Mathematics
Use the graph to evaluate the limit.Find 
f(x) and 
f(x)
A. -2; -7 B. -5; -2 C. -7; -2 D. -7; -5
Mathematics
Find the volume of the described solid.The base of the solid is the disk x2 + y2 ? 4. The cross sections by planes perpendicular to the 
between 
and 
are isosceles right triangles with one leg in the disk.
A. 
B. 
C. 
D. 
Mathematics
Identify the terms of the polynomial expression.-6t - 3b - a
A. 6t, -3b, a B. -6t, -3b C. -6t, -3b, -a D. -6t, 3b, a
Mathematics