Solve and graph. Write the answer in set-builder notation.9x ? 27
A. {x 
B. {x 
C. {x 
D. {x 
Answer: A
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Write the complex number in polar form. Express the argument in degrees, rounded to the nearest tenth, if necessary.
+ i
A. 4(cos 30° + i sin 30°) B. 4(cos 60° + i sin 60°) C. 2(cos 60° + i sin 60°) D. 2(cos 30° + i sin 30°)
An efficiency study conducted for a company showed that the number of devices assembled by the average worker t hr after starting work at 7 A.M. is given by
?
?
At what time during the morning shift is the average worker performing at peak efficiency?
?
At __________ A. M.
Fill in the blank(s) with the appropriate word(s).
Solve the polynomial equation in the complex numbers.x3 + 2x2 - 6x + 8 = 0
A. {-4, 4} B. {1 + i, 1 - i, 4i} C. {1 + i, 1 - i, 4} D. {1 + i, 1 - i, -4}
Factor by grouping.x3 + 4x2 + x + 4
A. (x2 + 4)(x + 1) B. (4x2 + 4)(x + 1) C. (x2 + 1)(4x + 4) D. (x2 + 1)(x + 4)