Answer:
The 95% confidence interval for the true proportion of Gastown residents living below the poverty line is (0.133, 0.2766).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence interval
, we have the following confidence interval of proportions.

In which
Z is the zscore that has a pvalue of
.
For this problem, we have that:
He takes a simple random sample of 122 people living in Gastown and finds that 25 have an annual income that is below the poverty line. This means that
and 
We have
, z is the value of Z that has a pvalue of
= 0.975, so
.
The lower limit of this interval is:

The upper limit of this interval is:

The 95% confidence interval for the true proportion of Gastown residents living below the poverty line is (0.133, 0.2766).
Answer:
a = 20.79cm ( 2 decimal places)
Step-by-step explanation:
find the length of the identical sides (i name it "x") first using Pythagoras theorem
= 
219.04 = 
= 219.04/2 = 109.52
x = 
now find a,
=
+ 
= 109.52 + 322.7477 = 432.2677
a =
= 20.791048
Answer:
55.5 i think
Step-by-step explanation:
75 + 36 = 111
111/2 = 55.5
(x; y)
reflect over
x axis (x; -y)
y axis (-x; y)
therefore
(-2; 3)
x axis (-2; -3)
y axis (2; 3)
<span>3x^2+17x+24
=(x+3)(3x+8)
hope that helps</span>