Need help plz brainiest to the correct answer

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?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,