Question

To make a small vase, Elisa uses no more than 4.5 ounces of clay. To make a large vase, she uses at least 12 ounces of clay. Which compound inequality represents the number of ounces of clay, c, that Elisa uses to make one vase of either size?

4.5 < c < 12
4.5 ≤ c ≤ 12
c < 4.5 or c > 12
c ≤ 4.5 or c ≥ 12

Answer 1

c ≤ 4.5 or c ≥ 12

Because "no more than 4.5" means c ≤ 4.5, "at least 12" means c ≥ 12, and she makes either a small or large vase (so use OR).