Which subtraction expression has the difference 1 + 4/?
A (-2+61) - (1-21)
B (-2+61)-(-1-21)
C (3+51)-(2-1)
D (3+51) - (2+1)

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

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step-by-step explanation: