Malcolm is so good at math that he can do most calculations in his head. it's very rare that he has to use a pencil and paper to answer a math problem. what should malcolm remember to do when taking math tests?

Show how he got his answer

Step-by-step explanation:

25

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