The rivers found in North America have always been an important natural resource for its human population. Historically, cities have always been located near major bodies of water because on water is more efficient than going over land. A. transportation

B. irrigation

C. recreation

D. life

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.

the glands which are associated with each description is given below:

50% lit on the left side

which

what is a measurement of the earth’s history divided into time periods?

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements