The cost to a store for a a box of cereal is $2.50. the store is selling the box of cereal for $3.50. what is the percent markup?

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

2/3

step-by-step explanation: