The data in the figure below represents the annual salaries of 120 professional mathematicians.
The median salary of this group of mathematicians is approximately

A. $70,000.
B. $40,000.
C. $60,000.
D. $50,000.
E. none of these

Answer: D

Mathematics

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A. 19.4 m B. 38.8 m C. 11.2 m D. 6.5 m

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Find the LCM of the set of numbers.10, 80

A. 90 B. 10 C. 80 D. 800

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Find the asymptotes of the hyperbola. -  = 1

A. y - 2 = (x + 3) and y - 2 = - (x + 3)
B. y + 3 = (x - 2) and y + 3 = - (x - 2)
C. y = (x - 2) and y = - (x - 2)
D. y + 3 = (x - 2) and y + 3 = - (x - 2)

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Identify the type of surface represented by the given equation. +  +  = 1

A. Ellipsoid B. Paraboloid C. Sphere D. Elliptical cone

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