RU ∥ ST and ∠STU≅∠QRU. Prove that ∠RST≅∠STU. I wrote "shaky" on the things im not so sure about. Please help me :(

Which fraction below is equivalent to 10/12?

Clara schumann is buying bagels for her coworkers, she buys a dozen bagels priced at $5.49 a dozen. the bakery's cost for making the bagels is $2.25 per dozen. what is the markup rate based on selling price on a dozen bagels?

Find the dimensions of the circle. area = 64π in.² r= in.