A horse weighs over 1500 pounds (roughly 680 kg). If the horse is running at 12 m/s and an 80 kg swashbuckler drops onto it, how fast are
they travelling after the swashbuckler lands? Round to two decimal
places.

What formula  this one  (x_/

I'll do it rn and then answer

The answer would be a

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