Answer:
The 90% confidence interval for the percentage of people the company contacts who may buy something is between 10.82% and 14%
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, 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:

90% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
The lower limit of this interval is:

The upper limit of this interval is:

The 90% confidence interval for the percentage of people the company contacts who may buy something is between 10.82% and 14%
Answer:
28 units
Step-by-step explanation:
ABCD is a rectangle. AC and BD are diagonals intersecting at point E.
Diagonals of a rectangle bisect each other.
(diagonals of a are equal in measure)

Answer:
is the solution
Step-by-step explanation:
Given
--- Correct expression

Required
Determine if the given solution is correct
To do this, we simply solve for x in the given equation.
So, we have:

Collect like terms


Divide both sides by -2



Answer:
One solution, 8x + 9
Step-by-step explanation:
3x + 9 + 4x + x
Add the x's
8x + 9
<em>good luck, hope this helps :)</em>