Suppose you have a population of 150 butterflies, but a wildfire devastates the population and only 24 butterflies survive. what percent does the colony decrease by?

The colony decrease by %

Explanation:

Given -

Total population of butterflies before devastation (P)

Total Population of butterflies that survived after the devastation

Total population of butterflies that did not survived

Substituting the given values in above equation, we get-

Total population of butterflies that did not survived

Percentage by which the butterfly colony decreased %

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.

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