Find all cube roots of the complex number. Leave answers in trigonometric form.4 - 4i
A. 
cis 100°, 
cis 220°, 
cis 340°
B. 
cis 60°, 
cis 180°, 
cis 300°
C. 
cis 80°, 
cis 200°, 
cis 320°
D. 
cis 100°, 
cis 220°, 
cis 340°
Answer: D
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Solve the problem.A company makes a very durable product. It sells 20,000 in the first year, but will have diminishing sales due to the product's durability, so that each year it can expect to sell only seventy-five percent of the quantity it will have sold the year before. How many of the product can the company expect to eventually sell?
A. 26,667 B. 40,000 C. 35,000 D. 80,000
Solve and simplify.
? x = 171
A. 23 B. 385 C. 171 D. 76
Perform long division.
A. -3x2 + 5x - 2
B. -3x2 + 5x - 2 + 
C. -3x2 + 5x - 2 + 
D. x2 - 2 + 
Subtract.(-5x4 + 6x6 - 8 + 9x5) - (9 + 6x5 + 4x6 + 2x4)
A. 2x6 + 3x5 - 7x4 - 17 B. 10x6 + 15x5 - 3x4 - 17 C. 10x6 + 15x5 - 3x4 + 1 D. 2x6 + 15x5 - 3x4 + 1