Find the area of each circle. Round to the nearest tenth. Use 3.14 or 22/7 for Pi. r = 7.1 m

158.3 m² (to nearest tenth)

Step-by-step explanation:

Given

Area of a circle =

⇒ area = 3.14 x 7.1²

⇒ area = 158.2874

⇒ area = 158.3 m² (to nearest tenth)

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.