Let A and B be sets with cardinal numbers, n(A) = a and n(B) = b, respectively. Decide whether the statement is true or false.n(A ? B) = n(B ? A)
A. True
B. False
Answer: A
Mathematics
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Solve. If the area of a square is represented by the expression 
find an expression for the length of each side.
A. (2x - 7)2 B. 2x + 7 C. (2x - 7)(2x + 7) D. 2x - 7
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Provide an appropriate response.Determine which equation corresponds to the graph.
A. y = -2 B. x = -2 C. y = x - 2 D. y = -2x
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Express the statement as an equation involving the indicated variables.The volume V of a sphere is 
times ? times the cube of the radius r.
A. V = 
? 
B. V = 
?r
C. V = 
?r3
D. V = 
?r2
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Solve the problem.The roof of a building is in the shape of the hyperbola 
where x and y are in meters. Determine the distance, w, the outside walls are apart, if the height of each wall is 8 m.
A. 10.9 m B. 6 m C. 3 m D. 9 m
Mathematics