A riverboat travels at an average of 14 km per hour in still water. The riverboat travels 130 km east up the Ohio River and 130 km west down the Ohio River total of 19.5 hours. To the nearest tenth of a kilometer per hour, what was the speed of the current of the river? The speed of the current aboutkm per hour.

126.66 m²

step-by-step explanation:

the pertinent area formula is a = πr², where r is the radius.

here, a = π(6.35 m)² = 40.32π, or approximately 126.66 m²

answer: what are the following choices

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.