Which of the following is a benefit of using dams as a source of freshwater? a. dams increase the chances of a flood. b. dams displace existing organisms. c. dams have a risk of failing. d. dams create water-recreation areas.

I personally think that it's D. If this is right you're welcome. If it's wrong feel free to delete this answer :p

Dams can help with the risk of flooding

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.

its 42

i say its d?