Use the product rule to simplify. Write the results using exponents.y ? y12
A. y12
B. 2y13
C. y13
D. 2y12
Answer: C
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = sin-1(x2 + y2)
A. Domain: all points in the xy-plane; range: all real numbers; level curves: circles with centers at (0, 0)
B. Domain: all points in the xy-plane satisfying x2 + y2 ? 1; range: real numbers - 
? z ? 
; level curves: circles with centers at (0,0) and radii r, 0 < r ? 1
C. Domain: all points in the xy-plane; range: real numbers - 
? z ? 
; level curves: circles with centers at (0, 0)
D. Domain: all points in the xy-plane satisfying x2 + y2 ? 1; range: real numbers - 
? z ? 
; level curves: circles with centers at (0, 0)
Determine if the statement is true or false.5 ? 5
A. True B. False
Indicate whether the statement is true always, sometimes, or never.A complex number is an imaginary number.
A. Always B. Sometimes C. Never
Solve the triangle. 
A. A = 51°, B = 87.2°, C = 41.8° B. A = 51°, B = 41.8°, C = 87.2° C. A = 41.8°, B = 87.2°, C = 51° D. A = 41.8°, B = 51°, C = 87.2°