Find an equation for the ellipse described.Center at (0, 0); focus at (0, -2); vertex at (0, 6)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: A
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Solve the problem.An oil storage tank can be described as the volume generated by revolving the area bounded by 
about the x-axis. Find the volume 
of the tank.
A. 66.5 m3 B. 399 m3 C. 1.85 m3 D. 2970 m3
Solve the problem.After being struck with a hammer, a gong vibrates 27 vibrations in the first second and in each second thereafter makes 
as many vibrations as in the previous second. Find how many vibrations the gong makes before it stops vibrating.
A. 108 vibrations B. 31 vibrations C. 36 vibrations D. 118 vibrations
Plot the Lissajous figure.x = 4 cos t, y = cos (t + 2)
A. 
B. 
C. 
D. 
Solve the equation for solutions over the interval [0, 2?). Write solutions as exact values or to four decimal places, as appropriate.tan 3x - sec 3x = 5
A. {4.3176, 10.6008, 16.8840} B. {1.4392, 3.5336, 5.6280} C. {1.9628, 4.5808} D. {5.8884, 13.7424}