Evaluate the series.
A. 81
B. 120
C. 12
D. 243
Answer: B
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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 = 
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
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
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}