Solving the 8+4i

[katsnowie]

What is the magnitude of 8+4i?
A. 4.15
B. 8.94
C. 12.00
D. 18.64
E. 32.00

Please help me. Thank you very much !

 

[Loren]

Plot the point on the rectangular coordinate system and find the length of the segment from the origin to the point.

 

[pka]

What is the magnitude of 8+4i?

\(\displaystyle \left| {a + bi} \right| = \sqrt {a^2 + b^2 }\)