Karen is studying an area that has many trees and goes through all four seasons. The trees lose their leaves as the seasons progress. Which biome is she studying?

deciduous forest
grassland
desert
tropical rain forest

Deciduous forest

Explanation:

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.

multiplying and dividing the two decimals and the eqations by the same number of the overalls