And atom can be compared to our solar system because, a the nucleus gives off light like the sun, b both electrons of planets move quickly, c electrons orbit the nucleus like planets orbit the sun, d all of the above

Im not 100 percent sure what the answer is. Im thinking its A or C

Explanation: Ik for a fact that its not D. I had this question and i picked  D and i got it wrong. I really hope this helps. Sorry if it doesnt.

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.