Which expression represents the approximate length of
BC?
(3) sin(669)
sin 39
sin (66°)
(3) sin (38°
(3) sin(389
sin (66)
sin (38)
3) sin(66)

(3) sin(389

Hope This Helps

its b

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.