30. Base your answer to the following question on the diagram below which represents an electric circuit. The voltmeter, V, reads 12 volts. Source 4 ohms 2 ohms (V)12 volts Ammeter A should read A) 6 A B) 2 A C) 3 A D) 9 A

The answer is 30 but I don't know how it arrived at that answer! Please explain

Is there any simpler solution to this? Without having to calculate so many variables?

After enjoying a big sandwich at Katz's Delicatessen, you decide to walk back to your luxury suite at the Waldorf-Astoria Hotel. First, you perambulate 0.15 mi at a polar angle of 160 degrees 0.15 mi angle 160^ ) . Next, you skedaddle 1.60 mi at a polar angle of 55 degrees (1.60 mi angle55^ ) . You follow this with a 0.55 mi jaunt at a polar angle of 150 degrees (0.55 mi angle150^ ) Finally, you be-bop 0.82 mi at a polar angle of 60 degrees (0.82 mi angle 60^ ) . What is the overall displacement from your starting point at Katz's Delicatessen? Express your answer in polar notation.