Which one doesn't belong

In the rectangle below ac=30 units what is de

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Lucy is a dress maker. she sews \dfrac47 7 4 of a dress in \dfrac34 4 3 hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable