One way to choose a representative sample in a survey is to select a very small sample from a population. select people at random from a population. obtain informed consent from subjects. place all the subjects in the control group.

175

step-by-step explanation:

2 inches x 10 miles = 200 miles - 3 inches = 175

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.