In figura alăturată este reprezentată o roată de bicicletă, razele OA, OB representånd două dintre
spițele roţii. Dacă OA = 30 cm și arcul mic AB are măsura
de 60°, atunci calculați lungimea arcului mic AB. )
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think the answer would beb

$113.42

i hope that is right.

step-by-step explanation:

answer: - (a)

(b) 88 seats

step-by-step explanation:

given: in an auditorium, there are 22 seats in the first row and 28 seats in the second row.

thus first term=

second term=

the number of seats in a row continues to increase by 6 with each additional row.

⇒d= 6

a) given formula :

b)   let the number of seats (n) = 12

substitute n=12 in the explicit rule formed in (a)

∴there are 88 seats in 12 rows.