Evaluate the series.

A. 81
B. 120
C. 12
D. 243


Answer: B

Mathematics

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Solve the problem.The surface of a snow-covered mountainside can be modeled by the function f(x,y) = e-((x - 0.5)2 + (y - 0.7)2),where x and y are coordinates in the horizontal plane (xy-plane). Find a unit vector that indicates the direction an avalanche will move initially if it begins at the point . Assume that the avalanche moves along the path of steepest descent.

A. u = 
B. u = 
C. u = 
D. u = 

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Solve the problem.Find the volume of the solid generated by revolving the region bounded by the curve  and the   about the x-axis.

A. ?2
B. ?3
C. 9?
D. 9?2

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Convert the area as indicated.5.56 square centimeters to square millimeters

A. 556 mm2 B. 55,600 mm2 C. 55.6 mm2 D. 5560 mm2

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Find the union of the sets.{-5, -1, 3, 6} ? {3, 6, 7}

A. {-5, -1, 3, 6} B. {-5, -1, 3, 6, 7} C. {3, 6} D. {3, 6, 7}

Mathematics