Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 
A. 0
B. 2
C. 1
D. No limit
Answer: D
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Find the coordinates of the vertices and foci of the ellipse.
+ 
= 1
A. V(-25, 0), V(25, 0), F(-20, 0), F(20, 0) B. V(0, -25), V(0, 25), F(0, -15), F(0, 15) C. V(0, -25), V(0, 25), F(0, -20), F(0, 20) D. V(-25, 0), V(25, 0), F(-15, 0), F(15, 0)
Evaluate the integral.
A. 
x sin(ln x) + 
x cos (ln x) + C
B. 
x sin(ln x) - 
x cos (ln x) + C
C. x sin(ln x) - x cos (ln x) + C
D. x cos(ln x) - x sin (ln x) + C
Solve the system by the method of your choice. Identify systems with no solution and systems with infinitely many solutions, using set notation to express their solution sets.y = 
x + 6x - 2y = -12
A. {(0, 6)} B. {(-12, 0)} C. {(x, y)|x - 2y = -12} D. ?
Use a calculator to give the value to the nearest degree.? = cos-1(0.8910)
A. 29° B. 25° C. 27° D. 63°