Question 631539
Please use a calculator to change the rectangular coordinates (-2.5,7) to polar form. Round r and &#952; to 3 decimal places and let -180° < &#952; < 180°. 
============================
Do it like this one:
----------
Please use a calculator to change -0.135 + 1.67i to polar form. Round r and &#952; to 3 decimal places and let –&#1083; < &#952; &#8804; &#1083;.
---------------

r =~ 1.657
----
Angle = atan(1.67/-0.135)
Angle =~ 94.622 degs