Discuss the equation and graph it.r = 
A. hyperbola, directrix perpendicular to
the polar axis 
unit right of the pole
vertices (
, 0), (- 
, ?)
B. ellipse, directrix perpendicular to
the polar axis 
unit left of the pole
vertices (
, 0), (
, ?)
C. ellipse, directrix parallel to
the polar axis 
unit below the pole
vertices (
, 
), (
, 
)
D. hyperbola; directrix parallel to
the polar axis 
unit above the pole
vertices (
, 
), (- 
, 
)
Answer: D
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Find the potential function f for the field F.F = -
i - 
j - 
k
A. f(x, y, z) = - 
+ C
B. f(x, y, z) = 
+ C
C. f(x, y, z) = 
+ C
D. f(x, y, z) = 
+ C
Simplify.240 ÷ 5 - 4
A. 231 B. 44 C. 240 D. 239
Solve the equation by expressing each side as a power of the same base and then equating exponents. 4(7 - 3x) = 
A. {3}
B. {-3}
C. {4}
D. 
Select the ordered pair that is a solution of the system of equations.
?
?
A. 
B. (10, 2)
C. (10, 28)
D. 
E. (2, 10)