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:

Lower
Confidence interval = p - error margin
Upper
Confidence Interval = p + error margin
So,
Confidence Interval 
Answer:
85+29x = 250
-85 -85
29x = 290
x = 10
10 weeks
Step-by-step explanation:
Answer:
2\16
Step-by-step explanation:
Answer:
50/50
Step-by-step explanation:
there are only two sides so they both get 50 percent