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. 81 ? x2 + y2 + z2 ? 100 and 1 ? x ? 9
B. 9 ? x2 + y2 + z2 ? 10 and x = 1 and x = 9
C. 9 < x2 + y2 + z2 < 10 and x = 1 and x = 9
D. 81 < x2 + y2 + z2 < 100 and 1 < x < 9
Answer: A
Mathematics
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and 
.
?
m = __________
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A. 2x3 - 5x2 + 3 + 
B. 2x3 - 7x2 + 6x -15 + 
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A. 
B. 
C. 
D. 
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