I have this series circuit. 4 resistors:
R1=100 ohms
R2=200 ""
R3=400 ""
R4=800 ""

i have to find current and E but I'm not too sure how to do that when all that is given is that.

My guess was to take Rt which is 1500 ohms divde it by 4 to get .002 and figured that was the I but I don't think thats right.

 

Notice that the equation is E = IR. With any two of the values, the third may be found. With only one given, about all you can do is say that for any E, I will be E/1500. Or, for any value of I, E will be I * 1500.