, sign tools chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://learning.k12.com/d21/le/drop stomer Supp... Newrow Support Class Connect LogMeln 123 Microsoft Office 365 Desmos learning.k12.. / 4.06 Mid..24R PDF Desktop Seats in a theater are curved from the front row to the back. The front row has 15 chairs, the second has 2 and the third has 27, and so on. a. Is this arithmetic, geometric, or neither? Explain how you can tell (2 points): b. Write a recursive rule for this series (2 points): c. Write an explicit rule in simplified form for this series. Show the steps to simplify. (2 points) d. Using the formula, find the number of chairs in row 9 (show work) (3 points): The auditorium can hold 24 rows of chairs. Write a sigma notation for this series, and then use either series formulas to calculate how many chairs can fit in the auditorium, Show all your work. Spaines 40.F h