Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Find the curvature of the space curve.r(t) = (t + 4)i + 8j + (ln(sec t) + 6)k
A. ? = sec t B. ? = csc t C. ? = cos t D. ? = sin t
Mathematics
Graph the function by first writing it in the form y = A sin(x + C). State the amplitude, period, and phase shift.y = 4
sin x - 4 cos x
A. Amplitude 4, period 2?,
phase shift - 
B. Amplitude 8, period 2?,
phase shift 
C. Amplitude 8, period 2?,
phase shift 
D. Amplitude 8, period 2?,
phase shift - 
Mathematics
Graph the negative number on a number line.- 
A. 
B. 
C. 
D. 
Mathematics
Find the eccentricity of the ellipse.16x2 + 4y2 = 64
A. 
B. 
C. 
D. 
Mathematics