Acompany manager wants to estimate the average length of phone calls in a call center for a tech support company. in a sample of 2500 calls, the mean duration is 163 seconds and the population standard deviation is 114 seconds. describe the distribution of this sample involving the sampling distribution of sampling means.

huh? im pretty sure it is in 199

step-by-step explanation:

y do u put "subscirbe to ence" on a app for ppl who need with their work?

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct