The answer would end up being 38 servings.
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0.51
The hundredths place increases when it is higher than or equal to 5 in the thousandths place.
Answer: -0.36
Step-by-step explanation:
Given: Mean : 
Standard deviation : 
We know that the formula to calculate the z-score is given by :-

For x=8.2 minutes, we have

Hence, the z-score for this amount of advertising time = -0.36