Electricians and those who work in the field of electronics, must often employ formulas. Being able to solve a literal equation for a variable is an important skill in such work. The example provided in the interactive application will give you an opportunity to practice your skills in manipulating formulas and solving for specific variables.

In each of the situations described, you are asked to solve for R, which represents the total resistance that resistors connected in parallel exert on a circuit. Try working through each problem with paper and pencil to solve for R. Use the interactive application to check your work by clicking on the "play" button and then select a button that represents the number of resistors being used.