Find the magnitude.Let u = . Find the magnitude (length) of the vector: -4u.

A. -20
B. 100
C. -20
D. 20

Answer: D

Mathematics

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Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the x-axis.y = 6x, y = 12x, y = 6

A. 18? B. 36? C. 6? D. 12?

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Solve the problem.What region in the xy-plane minimizes the value of ?R

A. The ellipse 9x2 + 100y2 = 900
B. The ellipse  +  = 1
C. The ellipse 100x2 + 9y2 = 1
D. The ellipse  +  = 1

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Solve the equation.6(x + 5) = 7

A.
B.
C.
D.

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Simplify. + 

A. 1
B.
C.
D.

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Mathematics