Find all the roots of the complex number. Put answers in standard form.Cube roots of 64 (cos 120° + j sin 120°)
A. 4(0.643 + 0.766j), 4(-0.342 + 0.940j), 4(0.985 - 0.174j)
B. 4(-
+ 
i), 4(
i - 
), 4(
+ 
i)
C. 4(
+ 
i), 4(-
+ 
i), 4(
- 
i)
D. 4(0.766 + 0.643j), 4(-0.940 + 0.342j), 4(0.174 - 0.985j)
Answer: D
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Translate the argument into symbolic form. Then use a truth table to determine whether the argument is valid or invalid. (Ignore differences in past, present, and future tense.)There must be a cease-fire or there is fighting. 
? There is no cease-fire.
What will be an ideal response?
Perform the indicated operation. Write the answer in the form a + bi.
A. - 
B. 
+ 
i
C. 1 + 
i
D. -1 + 
i
Solve the problem.If A-1 = 
, solve AX = 
for X.
A. X = 
B. X = 
C. X = 
D. X = 
Convert the length as indicated. Round the answer to one decimal place.5.1 feet to centimeters (feet ? inches ? centimeters)
A. 155.4 cm B. 13.0 cm C. 129.5 cm D. 200.8 cm