Answer:

Step-by-step explanation:
From the question we are told that:
Sample size 
Standard deviation 
Confidence level 
Degree of Freedom 
Therefore
Test T from table is given

Generally the equation for Confidence interval CI is mathematically given by



Answer:
Final answer is approx 6.644 years.
Step-by-step explanation:
Answer:m=3
Step-by-step explanation:
11-2=9
9/3=3
Im pretty sure it’s A because a squares area is base x height which would be 13x13= 169 then add the area of the triangle which would be 53.3, so 169+53.3 = 222.3