Which of the following sequences is an arithmetic sequence?
a. {1,4,16,48,…}
b. {−10,5,−2.5,1.25,…}
c. {100,20,4,0.8,…}
d. {−10,−3.5,3,9.5,…}

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