Based on the given answers, do you possibly mean 100 instead of 102?
If so, you would move the decimal point of 8.4 two places to the right, meaning the answer would be letter D. 840.
<u>Answer with explanation:</u>
As per given , we have
A sample of 50 gribbles finds an average length of 3.1 mm with a standard deviation of 0.72.
i.e. n= 50
Degree of freedom = n-1=49


The point estimate of the population mean is equals to the sample mean.
i.e. The best estimate for the length of gribbles= 3.1 mm
Also, population standard deviation is unknown , then the confidence interval would be :

For df= 49 and significance level of 0.05 , the t- value (using t-distribution table) would be :

Now, Margin of error : 

95% confidence interval : 

13x is that what you meant???
Answer:
11 11/12
Step-by-step explanation:
its approximately 12
Given :
A cashier at Giorgio's Grocery Store gets paid $8 per hour for shifts of 6 hours or less.
And $12 per hour for working shifts over 6 hours long.
To Find :
A function best represents this situation.
Solution :
Let, number of hours is h and amount paid is y .
For, h ≤ 6
y = 8h
For, h > 6
y = 12h
Therefore, function representing this is :
y( h ) = 8h , x ≤ 6
12h , x > 6
Hence, this is the required solution.