Please can someone help on this ive never attempted or understand this sort of question Q = 1/6 p^2

p=13.6 correct to 3 significant figures

By considering bounds work out the value q to a suitable degree of accuracy GIVE A REASON FOR YOUR ANSWER

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