You carry a 20.n bag of dog food up a 6.0 m flight of stairs. how much work was done

N-m

Explanation:

Work done is equal to the product of  mass of an object and the distance by which it is displaced.

Hence, mathematically the relationship between work done (W), Mass of an object (M) and its displacement (D) is equal to

Substituting the given values in above equation, we get -

N-m

Hence, work of N-m is done here

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.

i think the answer is gold im not entirely sure