Answer:
The correct answer is c Y=3x
Step-by-step explanation:
Hope this helps!
Answer:
Following are the solution to the given question:
Step-by-step explanation:
Confidence Interval for both the percentage of all x-ray machines
p = the machinery's share is not working:
![\text{Margin of Error} = Z_{(\frac{\alpha}{2})} \times \sqrt{( p \times (1-p)}{n})](https://tex.z-dn.net/?f=%5Ctext%7BMargin%20of%20Error%7D%20%3D%20Z_%7B%28%5Cfrac%7B%5Calpha%7D%7B2%7D%29%7D%20%5Ctimes%20%5Csqrt%7B%28%20p%20%5Ctimes%20%281-p%29%7D%7Bn%7D%29)
Lower
Confidence interval = p - error margin
Upper
Confidence Interval = p + error margin
So,
Confidence Interval ![= ( 0.78 , 0.87 )](https://tex.z-dn.net/?f=%3D%20%28%200.78%20%2C%200.87%20%29)
The answer is 6 months because $1100 - $200 (which he already has) = $900. $900 divided by $150 (which he saves each month) = 6. So it took him 6 months to save up enough.
The answers would be a and then ctell me if you need an explaination