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:
it is more intense by 3.0
Step-by-step explanation:
For example, if he sell $100 amounts of products, than he will get $1.5 commissions.
$100 x 0.015 = $1.5
It’s B I hope this helps :)