1. in an auditorium, there are 21 seats in the first row and 26 seats in the second row. the number of seats in a row continues to increase by 5 with each additional row. (a) write an iterative (explicit) rule to model the sequence formed by the number of seats in each row. show your work. (b) use the rule to determine how many seats are in row 15. show your work. 2. rhonda started a business. her business made $40,000 in profits the first year. her annual profits have increased by an average of 6% each year since then. (a) write an iterative rule to model the sequence formed by the profits of rhonda’s business each year. (b) use the rule to determine what the annual profits of rhonda’s business can be predicted to be 20 years from the start of her business. round your answer to the nearest dollar. do not round until the end. show your work. 3. the sequence 3, 12, 48, 192, … shows the number of pushups kendall did each week, starting with her first week of exercising. (a) what is the recursive rule for the sequence? (b) what is the iterative rule for the sequence?