1. Martha makes an error converting the complex number to polar form. Where did she make her error? Determine the correct answer and explain what Martha did wrong.
r = √ [ (-5√3)^2 + 5^2 ] = √ [75 + 25 ] = √100 = 10
θ = arctan ( 5 / [ -5√3] = -1 /√3 = -pi/6
But this point is in the second quadrant so theta = 5pi/6
-5√3 + 5i = 10 [cos (5pi/6) + i sin ( 5pi/6) ]