Identify the conic that the polar equation represents. Also, give the position of the directrix.r = 
A. ellipse, directrix perpendicular to the polar axis 2 left of the pole
B. ellipse, directrix perpendicular to the polar axis 2 right of the pole
C. ellipse, directrix parallel to the polar axis 2 below the pole
D. ellipse, directrix parallel to the polar axis 2 above the pole
Answer: C
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Evaluate the radical function. If the function value is not a real number, state so.If f(x) = 
, find f(11).
A. 2 B. 1 C. -2 D. 8
Solve the problem.A rug is to fit in a room so that a border of even width is left on all four sides. If the room is 11 feet by 
and the area of the rug is 27 square feet, how wide will the border be?
A. 4 ft B. 6.5 ft C. 6 ft D. 5 ft
Determine if the function is concave up or concave down in the first quadrant.y = x4/9
A. Concave up B. Concave down
Find the indicated term using the given information.a = 5, d = 4; a49
A. -187 B. 197 C. 201 D. -191