Solve the problem.Find the mass of the solid in the first octant between the spheres 
and 
if the density at any point is inversely proportional to its distance from the origin.
A. 15k?
B. 
k?
C. 
k?
D. 90k?
Answer: C
Mathematics
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Solve the system by substitution. -4x + 8y = 56 x + 7y = 49
A. No solution B. (0, 7) C. (1, 6) D. (-7, 0)
Mathematics
Find the number of elements in the indicated set by referring to the given table.The table below shows the results of a poll taken in a U.S. city in which people are asked which candidate they intend to vote for in an upcoming presidential election. 
Find the number of people in the set R' ? (A ? F)
A. 812 B. 929 C. 1224 D. 295
Mathematics
Find the least common denominator.
- 
A. (x - 3)(x - 3) B. (x - 3)(x + 6) C. (x - 3)(x - 3)(x + 6) D. (x + 3)(x + 3)(x + 6)
Mathematics
Identify the expression as a polynomial or not a polynomial.-1
A. Not a polynomial B. Polynomial
Mathematics