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B and C, but also D has the same result, but not correct expression.

Step-by-step explanation:

A) 1/2 year of ribbon. She cut it in 6 peaces, so it is :

(1/2)/6 not (1/2)/(1/6).

B) he use 1/6 of peper. He has 1/2 of paper, so it is (1/2)/(1/6). It is three. Its ok

C) (1/2)/(1/6) it is also true

D) 2 pound, so it is 2/(1/6) it is not true.

E) 6/2 which is equal like (1/2)/(1/6)

99

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