Find the indicated roots.Fifth roots of 1; trigonometric form
A. 1, cos 72° + i sin 72°, cos 144° + i sin 144°, cos 216° + i sin 216°, cos 288° + i sin 288°
B. -1, cos 36° + i sin 36°, cos 108° + i sin 108°, cos 252° + i sin 252°, cos 324° + i sin 324°
C. 1, cos 36° + i sin 36°, cos 108° + i sin 108°, cos 252° + i sin 252°, cos 324° + i sin 324°
D. -1, cos 72° + i sin 72°, cos 144° + i sin 144°, cos 216° + i sin 216°, cos 288° + i sin 288°
Answer: A
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Find the magnitude and direction angle (to the nearest tenth) for each vector. Give the measure of the direction angle as an angle in [0,360°].
A. 10; 225°
B. 20; 45°
C. 10
; 45°
D. 10
; 225°
Solve. Round to two decimal places unless otherwise noted.Suppose the cost per ton, y, to build an oil platform of x thousand tons is approximated by 
What is the cost per ton for x = 200?
A. $378.79 B. $75,757.58 C. $937.50 D. $100,000.00
Write any percent as a decimal and any decimal as a percent.0.008 of all math majors at a certain university double major in music.
A. 0.8% B. 8 C. 0.08% D. 8%
Choose the right premise for the given statement and conclusion.
Ad Hominem (Personal Attack) Fallacy My physics teacher has not made any significant discoveries, so what can he teach us? Conclusion: My teacher cannot educate us. a. Premise: The physics teacher has not made any significant discoveries. b. Premise: The physics teacher cannot teach us. c. Premise: The physics teacher cannot make any significant discovery. d. Premise: The physics teacher cannot educate kids.