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.Two plumbers make house calls. One charges $90 for a visit plus $40 per hour of work. The other charges $70 per visit plus $50 per hour of work. For how many hours of work do the two plumbers charge the same?
A. 2 hr B. 2.5 hr C. 1.5 hr D. 1 hr
Solve.A triangular lake-front lot has a perimeter of 1800 feet. The second side is 400 feet longer than the first side, while the third side is 500 feet longer than the first side. Find the lengths of all three sides.
A. First: 100 ft; second: 200 ft; third: 300 ft B. First: 400 ft; second: 800 ft; third: 900 ft C. First: 400 ft; second: 400 ft; third: 400 ft D. First: 300 ft; second: 700 ft; third: 800 ft
Calculate.-0.4 ? (-10.7)
A. 11.1 B. 4.28 C. -11.1 D. -10.3
Evaluate the double integral.
A. 
B. 
C. 8
D. 32