activity 10: "My Life is a Series" 1. Determine the capacity of an auditorium with 30 rows of seats if there are 16 seats in the first row 20 on the second row, 24 on the third row and so on. 2. Logs are stacked in a pile. The bottom row has 22 logs and the top row has 14 logs. Each has on less log than the row below it. How many rows of logs are there? How many logs are there?​