Answer:
The lower limit is 75.04
The upper limit is 78.96
Step-by-step explanation:
From the question we are told that
The sample size is 
The sample mean is 
The standard deviation is 
Given that the confidence level is 95% then the level of significance is mathematically represented as


The critical value for
obtained from the normal distribution table is

Generally the margin of error is mathematically represented as

=> 
=> 
The 95% confidence interval is mathematically represented as

=> 
=> 
c=8
Step-by-step explanation:
13-5=c, c=8
Answer:
y= -4x + 2
Step-by-step explanation:
Y= mx + b is used to find the equation of the line
m=-4 a d b= 2
So, you put them into the equation.
Answer:
2a=1/2
a=1/4
Step-by-step explanation:
Answer:
6/10
Step-by-step explanation:
i think sorry if incorrect