A) it is a function
use the vertical line test
Answer: 0.8490
Step-by-step explanation:
Given : The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.0 inches and a standard deviation of 0.9 inches.
i.e.
and 
Let x denotes the lengths of aluminum-coated steel sheets.
Required Formula : 
For n= 36 , the probability that the average length of a sheet is between 29.82 and 30.27 inches long will be :-

∴ Required probability = 0.8490
X = 13
Hope that helps (:
If you need me to show my work letme know!
Answer:
675
Step-by-step explanation:
5% of 4500 is 225
225 x 3 = 675
675 + 4500 = 5175