I have a lot of questions left l. m.a. o

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?

Landon wrote that 3−2.6=4. which statement about his answer is true?

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.