Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 7x2 - 2y2
A. Domain: all points in the x-y plane; range: all real numbers; level curves: ellipses 
B. Domain: all points in the first quadrant of the x-y plane; range: all real numbers; level curves: hyperbolas 
C. Domain: all points in the x-y plane; range: all real numbers; level curves: hyperbolas 
D. Domain: all points in the x-y plane; range: real numbers z ? 0; level curves: ellipses 
Answer: C
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for x = 
, y = - 
A. - 
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C. - 
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Find the distance around the figure below by using the appropriate formula, if 
, 
. Round approximate answer to two decimal places.
?
?
A. 16.28 cm
B. 9.14 cm
C. 11.14 cm
D. 14.28 cm
E. 20.57 cm
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