Answer: If p=0.19, then to update this study, the files of 98 public accountants should be studied.
If no prior estimate of the population proportion is given then to update this study, the files of 271 public accountants should be studied.
Step-by-step explanation:
As per given , we have
Margin of error : E = 0.05
Critical value for 90% confidence : ![z_{\alpha/2}=1.645](https://tex.z-dn.net/?f=z_%7B%5Calpha%2F2%7D%3D1.645)
Prior estimate of population proportion: p= 0.19
Formula for sample size :
![n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.19(1-0.19)(\dfrac{1.645}{0.05})^2\\\\=166.582899\approx167](https://tex.z-dn.net/?f=n%3Dp%281-p%29%28%5Cdfrac%7Bz_%7B%5Calpha%2F2%7D%7D%7BE%7D%29%5E2%5C%5C%5C%5C%3D0.19%281-0.19%29%28%5Cdfrac%7B1.645%7D%7B0.05%7D%29%5E2%5C%5C%5C%5C%3D166.582899%5Capprox167)
∴ To update this study, the files of 167 public accountants should be studied.
If no prior estimate of the population proportion is given , then
we take p= 0.05
Required sample size :
![n=0.5(1-0.5)(\dfrac{1.645}{0.05})^2\\\\=270.6025\approx271](https://tex.z-dn.net/?f=n%3D0.5%281-0.5%29%28%5Cdfrac%7B1.645%7D%7B0.05%7D%29%5E2%5C%5C%5C%5C%3D270.6025%5Capprox271)
∴ To update this study, the files of 271 public accountants should be studied.
Answer: X = 10.20240940...
Step-by-step explanation:
x(2x + 9) = 2x^2 + 9x
2x^2 + 9x = 300
- 300 ON BOTH SIDES
2x^2 + 9x - 300 = 0
SOLVE USING THE QUADRATIC FORMULA
x = -b +/- all root (b)^2 - 4(a)(c) All over 2(a)
When all the values are plugged in:
When using "+" in the equation you should get:
x = 10.20240940…
When using "-" in the equation you should get:
x = −14.70240940…
Now.. you CANNOT have a negative length, so you cross of the negative value leaving you one value for x which is 10.20240940...
YOUR ANSWER IS: x = 10.20240940...
Https://www.algebra.com/algebra/homework/Linear-equations/Linear-equations.faq.question.798537.html
Answer:
your awnser should be. 53