Find the exact value of the expression.cot-1
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Find the focus and directrix of the parabola.- 
x2 = y
A. (0, -10); y = 10 B. (-20, 0); x = 10 C. (0, 10); y = -10 D. (0, -10); y = -10
Mathematics
Name the quadrant or axis in which the point lies.(-15, -9)
A. quadrant I B. quadrant II C. quadrant III D. quadrant IV
Mathematics
Express the number in standard notation.9.17 × 10-4
A. 0.0000917 B. -917,000 C. 0.00917 D. 0.000917
Mathematics
Solve the system by the substitution method.
A. (9, 0) B. (9, 0), (-9, 0) C. (-9, 0) D. ?
Mathematics