Answer:
c) (26.295, 28.705)
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 
.
So it is z with a pvalue of 
, so 
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.
The lower end of the interval is the sample mean subtracted by M. So it is 27.5 - 1.205 = 26.295 mi/gallon
The upper end of the interval is the sample mean added to M. So it is 27.5 + 1.205 = 28.705 mi/gallon
So the correct answer is:
c) (26.295, 28.705)
Answer: a is actually 1 and b is 7
Step-by-step explanation:
this is a quadratic formula and a is the leading coefficient which is 1 and 7 is b
Answer:
52°
Step-by-step explanation:
A and D correspond to each other and we know A is 52°, so D is 52°.
For number 8. spencer finished more, the common denominator is 40. so spencer finished:30,40 and simone:16/40
