My dog Emmy loves to go for afternoon walks. She walks 2.1 miles almost every day. If her total mileage for this year as of today is 67.2 miles, how many days has she gone on a walk in 2020?

32

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