Mathematics, 01.04.2020 20:41 krishawnnn
An amphitheatre has 19 seats in the first row, 22 in the second, 25 in the third, and so on, for 29 rows. How many seats are in the amphitheatre?
The amphitheatre has
seats.
PLEASE HELP
Answers: 1
![S_{n} = n /2 [ a + l]](/tpl/images/0576/1496/7b8aa.png)
![S_{n} = 29 / 2 [ 19 + 103]](/tpl/images/0576/1496/65d48.png)
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An amphitheatre has 19 seats in the first row, 22 in the second, 25 in the third, and so on, for 29...
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