Customers of a phone company can choose between two service plans for long distance calls. The first plan has no monthly fee but charges 0.11 for each minute of calls. The second plan has a 16 monthly fee and charges an additional .07 for each minute of calls. For how many minutes of calls will the costs of the two plans be equal?

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.

the answer for this is 0.25 km. : )