the battery of a car has a rating stated which permit you to estimate the length of time a fully charged battery could deliever any particular current before discharge approximately how much energy is stored by a 50 ampere minute 12 volt battery

600Joules

Explanation:

The energy stored by this battery is calculated using the energy formula;

E = Q× v

Where E is energy

Q is the charge

v is voltage

Hence E = 50 × 12 = 600Joules

Note Q = 12 ampere minute

whichever one it is, it's definitely not one that you included on the list you provided.

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.