1. A given set of scores forms a normal distribution. The mean of the set of scores is 80 and the standard deviation of 6. What percentage of scores lie between 80 and 86?
O 95
O 34
O 47.5
68

One deviation from the mean is 34% and since your answer is just one deviation from the mean, the answer is 34%

no not all of them.

step-by-step explanation:

some of them have a square base.

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