Answer:
135
Step-by-step explanation:
20+30+22+30+19+14=135
Answer:
by dividing the given number by 100 and converting it to the smallest form.
Step-by-step explanation:
example
50%
50÷100
1÷5
Answer:
![MOE=\pm \ 1.41](https://tex.z-dn.net/?f=MOE%3D%5Cpm%20%5C%201.41)
Step-by-step explanation:
-Given that ![\sigma=1.91, n=7](https://tex.z-dn.net/?f=%5Csigma%3D1.91%2C%20n%3D7)
-We determine the z-value corresponding to the 95% confidence level:
![z_{\alpha/2}=z_{0.025}=1.96](https://tex.z-dn.net/?f=z_%7B%5Calpha%2F2%7D%3Dz_%7B0.025%7D%3D1.96)
-The margin of error is the degree of error from the real value and is calculated as follows:
![MOE=\pm z_{\alpha/2} (\frac{\sigma}{\sqrt{n}})\\\\=\pm z_{0.025}\times\frac{\sigma}{\sqrt{n}}\\\\=\pm 1.96\times \frac{1.91}{\sqrt{7}}\\\\=\pm 1.41](https://tex.z-dn.net/?f=MOE%3D%5Cpm%20z_%7B%5Calpha%2F2%7D%20%28%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%29%5C%5C%5C%5C%3D%5Cpm%20z_%7B0.025%7D%5Ctimes%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%5C%5C%5C%5C%3D%5Cpm%201.96%5Ctimes%20%5Cfrac%7B1.91%7D%7B%5Csqrt%7B7%7D%7D%5C%5C%5C%5C%3D%5Cpm%201.41)
Hence, the margin of error is ![\pm 1.41](https://tex.z-dn.net/?f=%5Cpm%201.41)
Vertex: V=(0,0)=(h,k)→h=0, k=0
Opens downward:
(x-h)^2=4p(y-k)
Width focal: p=-6<0 (donwnward)
Replacing h=0, k=0 and p=-6 in the equation above:
(x-0)^2=4(-6)(y-0)
x^2=-24y
Answer: The equation of the parabola is x^2=-24y