Find all complex roots. Write the answer in polar form, with 0 ? ? ? 360°.Square roots of 1 - i
A. 
(cos 22.5° + i sin 22.5°), 
(cos 202.5° + i sin 202.5°)
B. 
(cos 22.5° + i sin 22.5°), 
(cos 22.5° + i sin 22.5°)
C. 
(cos 157.5° + i sin 157.5°), 
(cos 337.5° + i sin 337.5°)
D. 
(cos 157.5° + i sin 157.5°), 
(cos 337.5° + i sin 337.5°)
Answer: C
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Solve the problem.An invoice received from Midtown Office Supply Distributors is dated Mar 4 with terms of 2/10 prox. Find the final date on which the cash discount may be taken and the net payment date.
A. Final discount date: Apr 10; net payment date: Apr 30 B. Final discount date: Apr 10; net payment date: May 1 C. Final discount date: Mar 14; net payment date: Apr 3 D. Final discount date: Mar 14; net payment date: Mar 31
Multiply mentally.3x2(2x3 + 3x2 - 4x)
A. 6x5 + 9x4 - 12x3 B. 6x5 + 9x4 + 4x3 C. 6x5 + 9x4 - 12x2 D. 6x4 + 9x3 - 12x2
Express the sum using summation notation. Use a lower limit of summation not necessarily 1 and k for the index of summation.(a + 1) + (a + d) + (a + d2) + . . . + (a + dn)
A. 
B. 
C. 
D. 
Use a graphing calculator to solve the system of equations. Round your solutions to one decimal place.1.6x + 16.7y + 2.8z = 2.14.6x - 7.0y + 1.0z = -3.52.4x + 5.7y - 1.3z = 11.2
A. (0.2, 0.1, -0.8) B. (2.3, 1.4, -8.3) C. (0.5, 0.3, -1.7) D. (1.1, 0.7, -3.8)