Tell which set or sets the number belongs to: natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers.17
A. whole, rational, real
B. integers, rational, real
C. natural, whole, integers, rational, real
D. real
Answer: C
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Determine the type of curve from the given information.A mirror is in the shape of a conic. If a ray of light is directed at one focus from a sufficient distance, it never reaches that focus, but is instead reflected toward the other focus. What type of curve is represented by the mirror?
A. Hyperbola B. Parabola C. Ellipse D. None of the above
Write one or more inequalities that describe the set of points.The closed region bounded by the spheres of radius 9 and 10, both centered at the origin, and the planes 
and 
A. 9 ? x2 + y2 + z2 ? 10 and x = 1 and x = 6 B. 81 < x2 + y2 + z2 < 100 and 1 < x < 6 C. 81 ? x2 + y2 + z2 ? 100 and 1 ? x ? 6 D. 9 < x2 + y2 + z2 < 10 and x = 1 and x = 6
Graph the solution region for the system of inequalities and identify the corners of the region.
A. 
B. 
C. 
D. 
Find the equation of the graph.
A. y = 5 B. y = -5 C. x = -5 D. x = 5