Find the intersection of the two sets.{2, 7, 5, 9} ? {5, 6, 2}
A. {2, 5, 9, 7, 6}
B. ?
C. {2}
D. {2, 5}
Answer: D
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Find the flux of the vector field F across the surface S in the indicated direction.F = x2y4i + yj - zk; S is the portion of the parabolic cylinder z = 9 - y2 for which 
and 3 ? x ? 5; direction is outward (away from the x-y plane)
A. 0 B. 108 C. 54 D. -108
Let x represent one number and let y represent the other number. Use the given conditions to write a system of equations. Solve the system and find the numbers.The sum of seven times a first number and six times a second number is 33. If the second number is subtracted from three times the first number, the result is 7. Find the numbers.
A. 5 and 1 B. 21 and 12 C. 14 and 6 D. 3 and 2
Write a linear inequality that describes the shaded region.
A. y ? -x + 1 B. y ? 2x + 2 C. y ? 2x + 2 D. y ? x - 1
Choose the most reasonable unit of measure.Area of a cross-section of a drinking glass: 21 
(mm2, cm2, m2, km2)
A. cm2 B. m2 C. mm2 D. km2