Use technology or a z-score table to answer the question.

scores on a standardized military exam are normally distributed with a mean of 57 and a standard deviation of 9. consider a group of 4000 military students.

approximately how many students will score less than 66 on the test?

a. 200

b. 634

c. 3366

d. 3800

C

Step-by-step explanation:

Finding the z-score:

z = (x - μ) / σ

z = (66 - 57) / 9

z = 1

Using a z-score table or calculator:

P(z < 1) = 0.8413

84.13% of 4000 is:

0.8413 (4000) = 3365.2

Rounding up to the nearest whole number, approximately 3366 students will score less than 66.  Answer C.

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm