Solve the problem.The area of a circle is found by the equation A = ?r2. If the area A of a certain circle is 36? square centimeters, find its radius r.
A. r = 6? cm
B. r = ± 6 cm
C. r = 6 cm
D. r = 6
cm
Answer: C
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Find the potential function f for the field F.F = (y - z)i + (x + 2y - z)j - (x + y)k
A. f(x, y, z) = x + y2 - xz - yz + C B. f(x, y, z) = xy + y2 - x - y + C C. f(x, y, z) = x(y + y2) - xz - yz + C D. f(x, y, z) = xy + y2 - xz - yz + C
Match graph with the appropriate equation.
A. 25x2 + 81y2 = 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 5x2 + 9y2 = 1
Construct a pie graph, with sectors given in percent, to represent the data in the given table.
A. 
B. 
C. 
D. 
Find the foci and endpoints of each axis for the given ellipse.
+ y2 = 1
A. Foci: (± 63, 0); vertices: (± 64 , 0);
endpoints of the minor axis: (0, ± 1)
B. Foci: (±
, 0); vertices: (± 8, 0);
endpoints of the minor axis: (0, ± 1)
C. Foci: (0 , ±
); vertices: (± 8, 0);
endpoints of the minor axis: (± 1, 0)
D. Foci: (±
, 0); vertices: (± 10 , 0);
endpoints of the minor axis: (0, ± 1)