Find a polar equation for the conic. A focus is at the pole.e = 
; directrix is perpendicular to the polar axis 1 to the left of the pole
A. r = 
B. r = 
C. r = 
D. r = 
Answer: D
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Graph the linear equation.
?
?
A.
B.
C.
D.
E.
Solve.Gary has to choose between two calling plans for his local phone service. Plan A charges a monthly fee of $30 regardless of how many local calls are placed. Plan B charges $15 per month plus $0.50 for each local call placed. Graph the system to find the number of calls that would have to be placed for the two plans to charge the same amount.
A. 20 calls B. 40 calls C. 50 calls D. 30 calls
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: real numbers - 
? z ? 
; 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 satisfying x2 + y2 ? 1; range: real numbers - 
? z ? 
; level curves: circles with centers at (0, 0)
D. Domain: all points in the xy-plane; range: all real numbers; level curves: circles with centers at (0, 0)
Use conversion factors to convert the units of measure.3,200 ounces to tons Round to the nearest tenth.
A. 0.1 T B. 0.2 T C. 200 T D. 1.6 T