Write the complex number in polar form. Express the argument in degrees, rounded to the nearest tenth, if necessary.-5i

A. 5(cos 90° + i sin 90°)
B. 5(cos 0° + i sin 0°)
C. 5(cos 270° + i sin 270°)
D. 5(cos 180° + i sin 180°)

Answer: C

Mathematics

Express 4000 in scientific notation.

a. 4 ð 100 b. 4 ð 101 c. 4 ð 102 d. 4 ð 103 e. 4 ð 104

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Mathematics

Solve the system. x - y + 3z = -23x + z = -2 x + 3y + z = -14

A. (-2, 0, -4) B. (0, -4, -2) C. (-4, 0, -2) D. (-2, -4, 0)

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Mathematics

Solve.8x(x - 4) - 100 = 5x(x - 9)

A. , -4
B. -25, 4
C. - , -4
D. - , 4

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Mathematics

Write the decimal as a percent.0.6

A. 0.06% B. 60% C. 0.6% D. 600%

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Mathematics