Asedimentary rock containing a fern fossil was found. what does this tell about the area at the time the rock was formed? the area was hot. the area was covered by an ocean. the area was on land. the area was cold.

A sedimentary rock containing a fern fossil tells that the area was on land at the time the rock was formed.

Explanation:

Ferns are vascular plants that thrive on land. They are mostly found in moist, shades and mountainous area in the country. If a ferns fossil  are found under a sedimentary rock, this only means that previously the area is a land and was not submerged under water. Geological process that takes place over a period of time may have contributed to the change in the location and topography of the area.

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.