1. The problem statement, all variables and given/known data In the circuit shown, the 33-ohm resistor dissipates 0.50 W. What is the battery voltage? 2. Relevant equations I am pretty sure that I use the equation V=IR, but I am not for sure how to go about using the 0.50W in the equation. At first I thought that I used P=IV for electric power, but I am just confused. 3. The attempt at a solution I don't even know what equation to exactly use because the watts are throwing me off.