what is the ratio of the average number of catfish to the average number of all fish in the samples?
1: 7
1: 4
2: 5
3: 4

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

what do u need to know

step-by-step explanation:

the answer is 1030 it's very simple math.

step-by-step explanation: