Answer: (2, -2)
Step-by-step explanation:

Step-by-step explanation:
The scientific notation:

<em>1 ≤ a < 10</em> and <em>k -</em><em> any integer number</em>
<em />

Answer:
The right answer is "
".
Step-by-step explanation:
The given values are:



As we know,
95% confidence for
will be:
= 
The lower bound will be:
= 
= 
The upper bound will be:
= 
= 
Thus the right answer is "
"
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