0.375 is 3/8 converted into a decimal, to get that you just divide 8 by 3.
Complete Question
The complete question is shown on the first uploaded image
Answer:
The 95% confidence interval is 
Step-by-step explanation:
From the question we are told that
The first sample size is 
The first proportion 
The second sample size is 
The second proportion is 
Given that the confidence level is 95% then the level of significance is mathematically represented as


From the normal distribution table we obtain the critical value of
the value is

Now using the formula from the question to construct the 95% confidence interval we have

Here 
=> 
=> 
and

=> 
=> 
So


Nobody goes around with lists of greatest common factors in their head.
When we need to know one, we grab the nearest pencil and work it out.
The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40 .
The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36 .
The common factors of 35 and 40 are 1, 2, and 4 .
The biggest one is 4 .
A) $6.17 each X 4 poster boards = $24.68 total
B) $200.20 total / 4 lights = $50.05
C) $200.20 on lights + $24.68 on poster boards = $224.88 spent in total
$300 available - $224.88 spent = $75.12 left over to spend