Answer:
FH = 24
Step-by-step explanation:
HG = 13
FH = 37 - 13
= 24
Answer:
We need at least 601 incomes.
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.
How many such incomes must be found if we want to be 95% confident that the sample mean is within $500 of the true population mean?
We have to find n, for which
. So






Rounding up
We need at least 601 incomes.
Answer:
9.22 miles
Step-by-step explanation:
Right triangle
6^2 + 7^2 = x^2
36 + 49 = x^2
Sqrt 85 = x
X = 9.22 miles
It would be 1.3 bescuse its only 2 significant figures