How much current is in a circuit that includes a 9-volt battery and a bulb with a resistance of 12 ohms?

Current = (voltage) / (Resistance)

If those are the ONLY things in the circuit, then

Current = (9 volts) / (12 ohms)

Current = 0.75 Ampere

v 154.9= 0.9 length length s little over 154.9cm

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)