Find the intervals on which the function is continuous.y = 
A. continuous on the interval 
B. continuous on the interval 
C. continuous on the interval
D. continuous on the interval 
Answer: A
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State the domain of the rational function.f(x) = 
A. (-?, ?) B. (-?, 6) ? (6, ?) C. (-?, -4) ? (-4, 6) ? (6, ?) D. (-?, -6) ? (-6, 4) ? (4, ?)
The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r = 
A. y2 = 25 - 10x B. x2 = 10y - 25 C. y2 = 10x - 25 D. x2 = 25 - 10y
Find the domain of the function.
A. {x|x ? 9} B. all real numbers C. {x|x ? 9} D. {x|x > 9}
The figure shows angle ? in standard position with its terminal side intersecting the unit circle. Evaluate sin ? and cos ?.
A. sin ? = - 
, cos ? = 
B. sin ? = - 
, cos ? = 
C. sin ? = - 
, cos ? = - 
D. sin ? = 
, cos ? = - 