Explain how you know that the product of 0.7 x 15.9 has 2 decimal places. what is the product of 0.7 x 15.9?

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

if x = 1, then the answer is 3.5