When scientists make a statement or claim about what will happen in the future based on a past experience or evidence, they are making a/an

Prediction

Explanation:

A prediction is a scientific statement or claim about something that will happen in the future, using prior knowledge and reasoning.

So, when scientists predict something to happen in the future, they are making a prediction.

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.