Ms. Kwan is making sandwiches for a class picnic. She prepares 1 1/2 sandwiches for each student in the class and 4 more sandwiches in case there are guests. which inequality shows how many students, S, are in the class if Ms. Kwan prepares no fewer then 49 sandwiches?

A S > 30 C S 30 D S < 30

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Sam chose D as the correct answer. how did he git that answer?
we are doing grater then or less then and grater then or = to and less then or = to