If anyone knows the answer plz asap you

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?

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.

Solve -3 (r + 5) = -9 enter ur answer in the box x = __