Suppose 110 geology students measure the mass of an ore sample. Due to human error and limitations in the reliability of the balance, not all the readings are equal The results are found to closely approximate a normal curve, with mean 83 g and standard deviation 2 g. Use the symmetry of the normal curve and the empirical rule
as needed to estimate the number of students reporting readings between 81 g and 85 9.
The number of students reporting readings between 81 g and 85 g is
(Round to the nearest whole number as needed)

yes. we do proportions in probabilities.

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

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet

i hope this is what you were looking for.

see attached graph