Find fx(x, y).f(x, y) = xye-x
A. -ye-x
B. e-x(1 - x)
C. ye-x(1 - x)
D. y(e-x - x)
Answer: C
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Use the given transformation to evaluate the integral.
Rwhere R is the interior of the ellipsoid 
A. 
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B. 
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C. 
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D. 
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Solve the problem.The amount of a radioactive substance present, in grams, at time t in months is given by the formula 
Find the number of grams present in 3 years. If necessary, round to three decimal places.
A. 297.633 B. 0.006 C. 0.056 D. 2976.328
Provide an appropriate response.If two functions are inverses of each other, then their graphs are symmetric with respect to ________ .
A. y = x B. the origin (0, 0) C. the y-axis D. the x-axis
Solve the problem using a known formula.A contestant in a 20-mile race finished in 5 hours. What was her average rate during the race? (Round to the nearest tenth, if necessary.)
A. 15 mph B. 100 mph C. 4.0 mph D. 0.3 mph