a plane travels at a speed of 212mph by rounding 212 to 1 signifiant figure and usng your answerto part a) part (ii) wokr out an estimate for the number of seconds the plane takes to travel 1 mile

so, converting firstly the mixed fractions to improper fractions and then "adding".

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.