An auditorium has 28 seats in the front row. each row behind the front has 3 more seats than the row directly in front of it. how many seats are there in the 11th row?

28+3=31

each seat behind the front seat had 31seats

the answer is b

step-by-step explanation:

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6