### Home > CCA2 > Chapter 10 > Lesson 10.2.1 > Problem10-88

10-88.
1. According to the school secretary, the size of the graduating class of Gauss High has steadily increased since the school has opened. She claims that the number of graduates each year forms the sequence t(n) = 42 + 12(n − 1), where n is the number of years the high school has had students graduate. At the end of the year, the administration mails out invitations to all previous graduates to attend the upcoming graduation ceremony. Homework Help ✎

1. In this situation, what does a sequence represent? What does a series represent?

$\text{Use the summation formula }S_{10}=\frac{10}{2}\left(t\left(1\right) + t\left(10\right)\right)$