Luci cuts a board that is 3/7 yard long into pieces that are 3/14 yard long. how many pieces does she cut?

When turned about its axis of rotation, which shape could have created this three-dimensional object?

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?

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a