A prepositional phrase is a group of words that lacks either a verb or a subject, and that functions as a unified part of speech. It normally consists of a preposition and a noun or a preposition and a pronoun.
It would be 3 days because if there are 30 chickens at first and you can feed them for 4 days, then there must be 120 pieces of chicken food. If you have 40 chickens, then you have to divide 120 by 40 which gets you 3 days.
The developmental pattern that a "how-to" essay would follow is a process analysis. The correct answer is option C. Process. This is a kind of essay that present directions; like how something should be done in order, or how something happened chronologically. It involves a step-by-step process from first to last.
D.
It means to make. For an example, "I'm going to suffix some pie".