DO NOT ANSWER UNLESS YOU KNOW IT. The principal randomly selected six students to take an aptitude test. Their scores were:
72.3 81.1 78.4 80.9 81.5 75.5
Determine a 90 percent confidence interval for the mean score for all students, show your work.
A) (75.13, 81.43)
B) (75.23, 81.33)
C) (81.33, 75.23)
D) (81.43, 75.13)

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

"image"

step-by-step explanation:

in most of these problems, the notation is that the point with a "prime" is the image of the point without. that is, b' is the image of b.

here, there is no dilation or reflection. there is simply translation (with no direction shown). which figure you call the "preimage" and which one you call the "image" is up to you. as a matter of convention, the naming is as described above.

3

step-by-step explanation: