True. It is often the case that additional information can be implied, calculated, or directly brought forward from earlier questions. This is not necessarily the case, however, as you may not be able to complete a question right away due to a lack of knowledge or understanding; but the use of 'may' in the question makes this a true statement.
Answer: really whenever, but it would take about 9 hours though.
Explanation:
The answer is the following: Four (Adj); score (N); and (Conj); seven (Adj); years (N); ago (Adv).
“Four” is an adjective because is giving information about the noun that follows, “score”. “And” is a conjunction. Conjunctions are used mainly to join phrases within a sentence. “Seven” is the adjective that is describing the following noun, “years”. Finally, “ago” is an adverb of time that is used in the simple past tense to indicate the period of time that has passed from the beginning of the action.
No you do not, composting is basically decomposing