Answer:
?????
Step-by-step explanation:
?????
Answer:
($47.245; $61.575)
Step-by-step explanation:
Mean sample repair cost (X) = $54.41
Standard deviation (s) = $28.89
Sample size (n) =44
Z-score for a 90% confidence interval (z) = 1.645
The confidence interval, assuming a normal distribution, is given by:

Applying the given data, the lower (L) and upper (U) bounds of the interval are:

The confidence interval is I = ($47.245; $61.575)
Answer:
120 in
Step-by-step explanation:
(5 in * 12 in)/2 = 30 in
30 in * 4 = 120 in
I hope that helps :D
5/6+(-1 1/6) = 5/6-7/6 = -2/6 = -1/3
answer: Put the sum 2 marks to the left of 0 (to place -1/3).