14% of 980?
15 is what percent of 50?
38% of $785?
78 is 20% of what number?
99 1/2% of 6,000?
12 1/5% of $25,000?
12 is 75% of what number?
30 is what % of 20?
1 1/4% of 20,000?

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.