The following table shows the probability of rolling the numbers 1 through 8 on a fair 8-sided die.
х
1
2
3
4
5
6
7
8
P(X1/8 1/8 1/8 1/8 1/8 1/8 1/8 1/8
What is the standard deviation of the random variable X, "the number that
comes up on the die"?
A. 3.5
B. 1.708
C. 3.745
D. 14.028
E. 2.291

hows it hangin lol

step-by-step explanation:

1760 kilometers

step-by-step explanation:

multiply the amount of time the plane took to travel by it's speed

look at the picture.

1.

ef : ab = 2 : 3

gf : cb = 2 : 3

gh : cd = 2 : 3

he : da = 2 : 3

2.

∠a ≅ ∠e

∠b ≅ ∠f

∠c ≅ ∠g

∠d ≅ ∠h

3.

use pythagorean theorem:

the length of the abcd trapezoid sides:

|ab| = 3 cm

|bc| = 10 cm

|cd| = 3(3) cm = 9 cm

|da| = 8 cm

the perimeter of abcd = 3 + 10 + 9 + 8 = 30 cm

the ratio of perimeters of the tarapezoids is equal 2 : 3.

substitute:

      cross multiply

      divide both sides by 3

6-3=3

3*3=9

9+12=21

21/3=7

7*8=56

56 is your answer