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(A) + n(B) - n(A ? B)
A. True
B. False
Answer: A
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Find the volume of the described solid.The solid lies between planes perpendicular to the x-axis at x = -2 and x = 2. The cross sections perpendicular to the x-axis are circles whose diameters stretch from the curve 
to the curve 
A. 
?2
B. 25?2
C. 25?
D. 
?2
Solve the problem.A building contractor finds that 
can of pipe joint compound is needed to plumb each new home. How many homes can be plumbed with 24 cans of compound?
A. 60 homes
B. 24 homes
C. 30 homes
D. 9
homes
Calculate.-107 - (-12 ) - (-33) - (-69)
A. 7 B. -197 C. -7 D. 197
Use a graphing calculator to sketch the graph of the quadratic equation, and then determine the x-intervals over which the graph is increasing and decreasing.y = x2 + 2x + 6
A. Increasing: (x > 1), Decreasing: (x < 1) B. Increasing: (x < 1), Decreasing: (x > 1) C. Increasing: (x > -1), Decreasing: (x < -1) D. Increasing: (x < -1), Decreasing: (x > -1)