Anormal distribution of scores has a standard deviation of 10. find the z-scores
corresponding to each of the following values:
a) a score that is 20 points above the mean.
b) a score that is 10 points below the mean.
c) a score that is 15 points above the mean
d) a score that is 30 points below the mean.

47

step-by-step explanation:

hi there!

the answer will be d: 2

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it