We need to use the formula to find Margin of Error but through the sample proportion, that is
We will use a 95% confidence interval, that is a z value of 1.96 (Search in a Normal distribution table)
A) For A our 
(proportion) is equal to 0.45. So applying the formula,
B) We make the same of point A, but change our proportion to 0.35
c) We need to calculate the SE through proportion for 0.1, that is
Then our Error is given by,
I don't know much about this but as far as I can tell the mean is about 8, that would make the deviation value of about 2
<span>(b+3)/7=(b-3)/6
6(b+3) = 7 (b-3)....> cross multiply
6b + 18 = 7b -21 ...>distributive property
6b - 7b = -21 -18 ...>subtract 7b to both sides then simplify
-b = -39 ...> multiply -1 to both sides
b = 39</span>
Step-by-step explanation:
Given
In a parallelogram
base (b) = 6 meters
Area of parallelogram (A) = 90 m²
height (h) = ?
We know
A = b * h
90 = 6 * h
h = 90 / 6
h = 15 meters.
Hope it will help :)
They all have a Functional.
