Find all the complex roots. Leave your answers in polar form with the argument in degrees. The complex fourth roots of -9i. A. Type an exact answer in the first answer box.
B. Type any angles in degrees between o and 360 needed.)
C. Type all degree measures rounded

Step-by-step explanation:

Given z = x+iy

The polar form of a complex number

The nth root of the complex number is expressed according to de moivre's  theorem as;

r is the modulus of the complex  number and is the argument

r = √x²+y²

Given z = -9i

r = √0+(-9)²

r = √81

r = 9

The argument will be equivalent to 180-90 = 90°

The forth root of -9i will be expressed as shown according to de moivre's theorem;

The complex roots are at when k = 0, 1, 2 and 3

When k = 0;

Note that all the degrees are rounded to the nearest whole number.

company a

step-by-step explanation:

using the linear regression models , it is found that company a   pays about $14 more. but using the same regression (linear) company b pays about $10 more.

so company a pays more than b