Answer:
um all you do is multiply 21 as the length by 14 was the width (LxW)
Step-by-step explanation:
=294 is your answer I think ...
Answer:
![\sigma=547.1125](https://tex.z-dn.net/?f=%5Csigma%3D547.1125)
Step-by-step explanation:
-The margin of error is calculated using the formula:
![ME=z_{\alpha/2}\times \frac{\sigma}{\sqrt{n}}\\\\](https://tex.z-dn.net/?f=ME%3Dz_%7B%5Calpha%2F2%7D%5Ctimes%20%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%5C%5C%5C%5C)
-We substitute the values, n=900 and ME=30 in the formula to solve for standard deviation:
![ME=z_{\alpha/2}\times \frac{\sigma}{\sqrt{n}}\\\\\\30=1.645\times\frac{\sigma}{\sqrt{900}}\\\\\sigma=\frac{30^2}{1.645}\\\\=547.1125](https://tex.z-dn.net/?f=ME%3Dz_%7B%5Calpha%2F2%7D%5Ctimes%20%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%5C%5C%5C%5C%5C%5C30%3D1.645%5Ctimes%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7B900%7D%7D%5C%5C%5C%5C%5Csigma%3D%5Cfrac%7B30%5E2%7D%7B1.645%7D%5C%5C%5C%5C%3D547.1125)
Hence, the population standard deviation is 547.1125
Answer:
three months-three years
Step-by-step explanation:
Answer:
center of mass
X = ![\frac{my}{m} = \frac{28}{19}](https://tex.z-dn.net/?f=%5Cfrac%7Bmy%7D%7Bm%7D%20%3D%20%5Cfrac%7B28%7D%7B19%7D)
Y = ![\frac{mx}{m} = \frac{872}{95}](https://tex.z-dn.net/?f=%5Cfrac%7Bmx%7D%7Bm%7D%20%3D%20%5Cfrac%7B872%7D%7B95%7D)
Step-by-step explanation:
y = x and x = 0
parabola ; y = 20 - x^2
attached below is the detailed solution
M =
б
Mx =
б
My =
б
X = ![\frac{my}{m} = \frac{28}{19}](https://tex.z-dn.net/?f=%5Cfrac%7Bmy%7D%7Bm%7D%20%3D%20%5Cfrac%7B28%7D%7B19%7D)
Y = ![\frac{mx}{m} = \frac{872}{95}](https://tex.z-dn.net/?f=%5Cfrac%7Bmx%7D%7Bm%7D%20%3D%20%5Cfrac%7B872%7D%7B95%7D)