Answer:
The confidence level for this interval is 99%.
Step-by-step explanation:
The margin of error M has the following equation.

In which
is the standard deviation of the population and n is the size of the sample.
z is related to the confidence level.
In this problem:

So



Looking at the z table,
has a pvalue of 0.995.
So the confidence level is:

The confidence level for this interval is 99%.
Answer:
I think exactly two coz you can decide to use mitric method or elimination method ( I think)
Answer:
4 × 5 + 7
Step-by-step explanation:
I did the math.
.....
B) 8(N-17)=30
8 times a the difference of a number and 17 is 30
Answer:
131 and 49
Step-by-step explanation:
Supplementary angle means 180° when all angles are added together.
First angle: (x + 82)
Second angle: x
(x + 82) + x = 180
2x + 82 = 180
2x = 98
x = 49
First angle: 49 + 82 = 131°
Second angle: 49°