A circus arena has eight sections of seats, labeled A-H. There are a total of 9625 seats. Seactions A-G have 40 rows of 30 sets in each section. Section H has 35 seats in a row. How many rows of seats are in Section H?

35 rows

Step-by-step explanation:

In Section A-G there are A B C D E F G, which are 7 sections.

40 rows x 30 seats = 1200 seats (each section), and

1200 seats x 7 sections = 8400 seats (A-G), and

9625 seats (total) - 8400 seats (A-G) = 1225 seats (H), and

1225 seats (H) ÷ 35 seats in a row (H) = 35 rows (H)

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.