If three out of every 200 people contract viral disease how many people will contract the viral disease among 30,000 people solve using proportions.

Step-by-step explanation:

let no of people that contracts it be p.

3/200 = p/30000

200p = 90000

p = 450

Topic: Rate and Proportions

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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.