Answer:
A
Step-by-step explanation:
given 
note that 49² = 2401, hence
=
→ A
Answer:
24.6 < μ < 27.2
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 25.9 - 1.3 = 24.6 pounds.
The upper end of the interval is the sample mean added to M. So it is 25.9 + 1.3 = 27.2 pounds.
So the correct answer is:
24.6 < μ < 27.2
Answer:
/2 and /4 because angle 1 is 90
Answer:
5
Step-by-step explanation:
0(0×2 + 0 + 1) + 5
0(0+0+1)+5
0 + 0 + 0 +5
= 5