A Carnot engine performs work at the rate of 520 kW with an input of 950 kcal of heat per second. The temperature of the heat source is 560oC. a. What is the efficiency of the Carnot engine

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

they should be similar or the same

i don't understand. explain it clearly