Answer: it is the third one hope it helps
The length of the radius would sqrt(1+4), or sqrt(5).
2
The angle would be in Quadrant II and would be arctan ------ , or arctan (-2).
-1
Find this angle using a calculator or table.
Then you end up with -1+2i = sqrt(5) angle arctan(-2). The angle would be + and measured from the + horizontal axis.
Answer:
9 1/4
Step-by-step explanation:
-1 1/4 + 10 2/4 = 9 1/4
14°48′
i think i looked it up on google ♀️