Which of the following are major arcs

Just tell me how to set up the equation.

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Acampus club held a bake sale as a fund raiser, selling coffee, muffins, and bacon and eggs sandwiches. the club members charged $1 for a cup of coffee, 3$ for a muffin , and $4 for a back. and egg sandwich. they sold a total of 55 items , easing $119. of the club members sold 5 more muffins than cups of coffee, how many bacon and egg sandwiches he’s did they sell