Find an equation of variation in which the following are true.y varies jointly as x and z, and y = 216 when x = 8 and z = 9
A. y = 27x
B. y = 
C. y = 5xz
D. y = 3xz
Answer: D
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Find the volume generated by revolving the region bounded by the given curves about the y-axis. Use the method of disks.y2 = x, y = 5, x = 0
A. 
?
B. 
?
C. 
?
D. 625?
Solve.Mike, Joe, and Bill are painting a fence. The painting can be finished if Mike and Joe each work for 4 hours and Bill works for 2 hours; or if Mike and Joe each work for 2 hours and Bill works for 5 hours; or if Mike works for 6 hours, Joe works for 2 hours, and Bill works for 1 hour. How much time does it take for each man working alone to complete the painting?
A. Mike: 12 hr; Joe: 10 hr; Bill: 10 hr B. Mike: 8 hr; Joe: 8 hr; Bill: 16 hr C. Mike: 8 hr; Joe: 16 hr; Bill: 8 hr D. Mike: 16 hr; Joe: 8 hr; Bill: 8 hr
Combine. Simplify the answer.
- 
A. 
B. 
C. 
D. 
Find all cube roots of the complex number. Leave answers in trigonometric form.-6
- 6i
A. 
cis 70°, 
cis 190°, 
cis 310°
B. 
cis 70°, 
cis 190°, 
cis 310°
C. 
cis 70°, 
cis 190°, 
cis 310°
D. 
cis 80°, 
cis 200°, 
cis 320°