The scores on a test given to all juniors in a school district are normally distributed with a mean of 78 and a standard deviation of 8. Find the probability that a randomly chosen junior has a score between 70 and 86.

The probability of randomly choosing a junior whose score is between 70 and 86
is __%.

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680

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

yes the total will be same because in both of them the expression.is rearranged but their sign remains the same hence it hss just been shuffled