physics
posted by please help .
five resistors of 30 ohms each are connected in parallel across a 120 volt line. the combined resistance of the five resistors is ___ ohms.
The total current in the circuit is ___ amperes.
The current in each branch is ___ amperes.
How do I set these up:?

1/rtotal= 1/R1+ 1/r2 + ...= 5/30
Rt=6ohms
current in each resistor: 120/30=4amps
total current=120/6=20amps