You see a penny lying on the ground. a penny won't buy much these days, so you think: "if i bend down to pick it up i will do work. to do that work i will have to burn some energy. it probably costs me more to buy the fuel (food) to provide that energy than i would gain by picking up the penny. it's not cost effective." you pass it by. show answer no attempt is the argument correct? estimate the energy cost for picking up a penny. you may find the following information useful: a jelly donut contains about 250 calories (1 calorie = 1 kcal).

Sorry i don’t know what to do

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current

Work is reduced while time is decreased