Jan is having the walls of her house painted. The cost depends on the area of the walls. Which is the dependent variable, and which is the independent variabl

The dependent variable is the cost, and the independent variable the area of the walls.

Step-by-step explanation:

-Hope this helps <3

a

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