(part 1 of 2): An airplane flying parallel to the ground undergoes two consecutive displacements. The first is 84 km at 33.7◦ west of north, and the second is 160 km at 65.3◦ east of north. What is the magnitude of the plane’s total displacement? Answer in units of km.

(part 2 of 2): At what angle east of north is the plane’s total displacement? Answer in units of ◦.

I'm not sure what your asking buddy.. but i know that you can weld two peices of steel by pure force and pressure.

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current