Answer: 
Step-by-step explanation:
Given: Sample size: n = 41
Sample mean
degrees
Population standard deviation
degrees
Confidence level (c) = 80% =0.80
Significance level (a) = 1- c = 1-0.80 = 0.20
z-score for 80% confidence level : z = 1.2816 [from z-table]
Confidence level for population mean :-







Hence, 80% confidence interval for the temperatures in the freezer 
They’re all -4 ,, what exactly are you asking ?
Answer:
6224
Step-by-step explanation:
Just multiply the two subjects.
Hope this helps :)
Answer:
7 P.M.
Step-by-step explanation:
Time at which the walk was begun = 4 p.m.
Finished after rotating the clock 90° i.e. = 3 hours
Thus,
The time at which the task finished = 4 p.m. + 3hours
= 7:00 PM
X=29/2, 15/2
this is the answer hope it helped