The height h in feet of a projectile launched vertically upward from the top of a 96-foot tall tower has an initial velocity of 80 ft/sec.
•Write the equation that represents this scenario. [Select]
•What is the maximum height of the projectile? Select ]
•How long did it take the projectile to reach its maximum height? [Select ]
•How long will it take the projectile to hit the ground? Select]

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

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