The formula for the circumference of a circle is:
C = 2πr [r is the radius]
Since you know r, you can plug it in
C = 2πr
C = 2π(5)
C = 10π or 31.4159......
Answer:
13 windows
Step-by-step explanation:
10 1/2 divided by 3/4=13.6666666667
it’s 93 and 1/2 :)) there you go
The 99% confidence interval for the true mean is given by:
![\bar{x}\pm z_{\alpha/2} \frac{\sigma}{\sqrt{n}}](https://tex.z-dn.net/?f=%5Cbar%7Bx%7D%5Cpm%20z_%7B%5Calpha%2F2%7D%20%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%20)
where:
![\bar{x}](https://tex.z-dn.net/?f=%5Cbar%7Bx%7D)
is the sample mean = 69.7
![\sigma](https://tex.z-dn.net/?f=%5Csigma)
is the standard deviation = 2.8
![z_{\alpha/2}](https://tex.z-dn.net/?f=z_%7B%5Calpha%2F2%7D)
is the test statistics = 2.58 for for 99% confidentce interval.
n is the sample size = 772.
Therefore, the 99% confidence interval is: