Answer:
The answer is C.)
Step-by-step explanation:
Answer:
Margin of error of 0.0485 hours.
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
That is z with a pvalue of 
, so Z = 1.96.
Now, find the margin of error M as such
In which 
is the standard deviation of the population and n is the size of the sample.
In this question:
The margin of error is of:
Margin of error of 0.0485 hours.
Answer:
$60
Step-by-step explanation:
40 text messages × .25 each = $10. Plus the $50 per month is $60.
Answer:
1,77,000.00 I not sure this answer correct or not but this number maybe correct.
Answer:
D
Step-by-step explanation:
The answer is D because for it to be a function x-value can only have one output. For D, 8 has two outputs 1 and 4.
