The class is about Electricity and Magnetism. The website wants exactly the perfect answer and in the same metric system units that are stated on the calculators that are on the picture for the question, if not, it'll mark it wrong.

Dimmer Switch 120 V Rhulb Some light dimmer switches use a variable resistor as shown in the gure above. The slide moves from position x = I] to x = 1, and the resistance up to the slide position x is proportional to x [the total resistance Rpm : 100 S2). If the resistance of the bulb is Rbulb = 493 94 what is the power expended in the lightbulb if a.x=l.00 OUse parallel and series equivalent resistor combinations to simplify the circuit. b.x=0.50