Simplify the radical. Assume that all variables represent positive real numbers.

A. 2x
B. 2x 
C. x
D. 2x


Answer: B

Mathematics

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Determine whether the line integral  is positive, negative or zero.

A. positive B. negative C. zero

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Solve the problem.An auditorium has 15 rows with 10 seats in the first row, 12 in the second row, 14 in the third row, and so forth. How many seats are in the auditorium?

A. 360 B. 390 C. 255 D. 300

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Approximate to three decimal places.

A. 14.423 B. 14.421 C. 14.422 D. 14.412

Mathematics

Find the vertices and the foci of the given ellipse. +   = 1

A. V: (0, -8), (0, 8);
F: (0, - ) and (0, )
B. V: (0, 64), (49, 0); 
F: (0, 8), (7, 0)
C. V: (-8, 0), (8, 0)
F: (- , 0), (, 0)
D. V: (0, -64), (0, 64); 
F: (0, -8), (0, 8)

Mathematics