Match the function with its graph.1) y = sin x2) y =  cos x3) y =  sin x4) y = cos xA) B) 

width="200" />  C) D)  



A. 1A, 2C, 3D, 4B

B. 1A, 2B, 3C, 4D

C. 1B, 2D, 3C, 4A

D. 1A, 2D, 3C, 4B

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Answer: C

Mathematics

Find  by using logarithmic differentiation.y = 

A.
B.
C.
D.

Transform the equation to a form without an xy-term by a rotation of axes and then identify the curve.3x2 + 4xy = 36

A.  +  = 1; ellipse
B.  -  = 1; hyperbola
C.  -  = 1; hyperbola
D.  -  = 1; hyperbola

Find the vertex, focus, and directrix of the parabola. Graph the equation.y2 = 8x

A. vertex: (0, 0)
focus: (0, 2)
directrix: y = -2

B. vertex: (0, 0)
focus: (2, 0)
directrix: x = -2

C. vertex: (0, 0)
focus: (0, 2)
directrix: y = -2

D. vertex: (0, 0)
focus: (-2, 0)
directrix: x = 2

Solve.12% of students at a small college lived at home while attending classes.

A. 12.0 B. 0.012 C. 1.2 D. 0.12