Sketch D and g(D) from the description of D and change of variables 
x = u2 - v2, y = 2uv where D is the rectangle 0 ? u ? 1, 0 ? v ? 1
A.
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B.
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C.
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D.
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Answer: B
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Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 
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Use a proportion to solve the problem.To determine the number of fish in a lake, a park ranger catches 240 fish, tags them, and returns them to the lake. Later, 72 fish are caught, and it is found that 20 of them are tagged. Estimate the number of fish in the lake.
A. 67 fish B. 864 fish C. 345,600 fish D. 6 fish
Use Gaussian elimination or Gauss-Jordan elimination to solve the problem.A basketball fieldhouse seats 15,000. Courtside seats sell for $8, end zone for $6, and balcony for 
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. How many of each type of seat are there?
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