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▹ Answer
<em>d. 7/20</em>
▹ Step-by-Step Explanation

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<u>Part A</u>
Using the Pythagorean on the right triangle PQR, with PQ and QR as the legs and PR as the hypotenuse,

<u>Part B</u>

the correct question in attached figure
Let
A1 -------------------------> area rectangular plot=4*9=36 m²
A2 ------------------------- > area square plot=x²
we have that
A1=A2
A2=x²=36---------------> x=√36=6 m
the answer is 6 m
Answer:
The standard error increases and the width of the interval increases
Step-by-step explanation:
The variance is equal to the square of the standard deviation. An increase in variance will increase the standard deviation.
The width of the confidence interval can be defined as:

The width is proportional to the standard deviation, so when the variance increases, the standard deviation and also the width of the interval increases.
Multiply both sides by (3*5)
5(2n)=3(n+14)
distribute
10n=3n+42
minus 3n both sides
7n=42
divide both sides by 7
n=6