N a 20 row theater, the number of seats increases by 3 with each successive row. The first row has 18 seats.
a. Write an arithmetic series in summation notation to represent the number of seats in the theater,<span><span>∑<span>n=1</span>20</span>18+3(n−1)</span><span>b. What is the total seating capacity of the theater? </span> 930 seats
c. Front row seats cost $60. After every 5 rows, the price drops $5. What is the amount generated by a full house? $46950
2. An arithmetic series has a first term of 4. The sum of the first 40 terms is 6080. Find the value of the 40th term? use the formula <span>sum of first n terms = n/2 * (s1 + sn) </span> <span>6080 = 40/2 * (4 + sn) </span>
