Answer:

Step-by-step explanation:
-Given that 
-We determine the z-value corresponding to the 95% confidence level:

-The margin of error is the degree of error from the real value and is calculated as follows:

Hence, the margin of error is 
I believe it’s Independent is what changes///dependent is affected by the independent or something similar hope this helps let me know if I’m wrong but I don’t think I am
The volume of a sphere is: 4/3 (pi) (radius cubed.) You would use that formula to solve for the volume.
Add all the numbers in the ratio together to get 18 then divide 180 by 18 to equal 10. then times that by each individual number in the ratio. so the answer is 40:50:90