Rationalize the denominator. Assume all variables represent positive real numbers.
A. 2a
B. 27
C. 
D. 
Answer: D
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Simplify, if possible.
A. 
B. 
C. 
D. 
Find the exact value of y, or state that y is undefined.y = cos-1
A. 
B. 
C. 
D. 
Find a set of parametric equations for the conic section or the line.Ellipse: Center: (2, -3); Vertices: 3 units above and below the center; Endpoints of Minor Axis: 2 units left and right of the center.
A. x = 2 + 2 cos t, y = 3 - 3 sin t B. x = 2 + 2 cos t, y = -3 + 3 sin t C. x = 2 + 3 cos t, y = -3 + 2 sin t D. x = 2 - 2 cos t, y = -3 - 3 sin t
Identify the coordinates of each point labeled in the figure. Name the quadrant in which each point lies, or state that the point lies on the x-axis or y-axis.
A. A(2, 6) in quadrant I; B(4, -3) in quadrant IV B. A(2, 4) in quadrant I; B (6, 4) in quadrant I C. A(6, 20) in quadrant I; B(4, -3) in quadrant IV D. A(2, 6) in quadrant I; B(-3, 4) in quadrant II