Answer: The answer is in the 1st image.
Explanation: The explanation is in the 2nd image.
The ratio of the area of square PQRS to the area of square ABCD is 5/9
<h3>Area of square ABCD</h3>
Assume the measure of the side lengths of the square ABCD is 1, then the area of the square ABCD is:


See attachment for the diagram that represents the relationship between both squares.
<h3 /><h3>
Pythagoras theorem</h3>
The measure of length PQ is then calculated using the following Pythagoras theorem:

Evaluate the squares

Add the fractions

<h3>Area of square PQRS</h3>
The above represents the area of the square PQRS.
i.e.

So, the ratio of the area of PQRS to ABCD is:

This gives


Hence, the ratio of the area of square PQRS to the area of square ABCD is 5/9
Read more about areas at:
brainly.com/question/813881
Answer:
B. the variability around the regression line.
Step-by-step explanation:
The standard errors represents the distance (how sparse) the observed values fall from the regression line.
Standard errors for regression are measures of the spread of variables around the average (regression line)
The standard error is dependent on the standard deviation of the observations and the reliability of the test.
When the test is perfectly reliable, the standard error is zero and when unreliable, it is equal to the standard deviation of the observations.
Answer:the ansewer is 80
Step-by-step explanation: