Question 54740
:
w = E*I, where E = voltage and I = current (not resistance)
:
Perhaps they want you to assume 120 volts which is the voltage at a standard outlet.
:
Ohm's law is helpful:
Resistance:  R = E/I, 
Current: I = E/R,
Voltage: E = IR
:
More power (in watts) equations:
P = I^2 * R
P = E^2/R