23 because you have multiply the x which will lead to x2 then divide by two
The formula for area is A = L*W or we can say A=LW. Lets plugin what we know.
A = LW
8 = 4W
Now solve for W
8 = LW
8=LW
8/4 = 4W / 4
2 = W
W = 2
So the width is 2ft
Answer: "13,000 books" represents the population.
"200" books represents the sample.
Step-by-step explanation:
- A population is the term that denotes a whole large possible group of individuals, objects, events or measurements.
- A subset of population is known as ample.
- When population is too large to the researcher , then it uses sample to represent the entire population.
Here, "13,000 books" represents the population.
"200" books represents the sample which is a subset of 13,000 books.
The radius of B is 2.5cm.
<h3>What is a circle?</h3>
A circle is the locus of points equidistant from a common point which is called the center of the circle.
Analysis:
Area of circle A = π
/4 = π
/4 = 225π/4
Area of circle B = π
But A = 9B
225π/4 = 9 x π
= 225/36 = 25/4
r = 
= 5/2 = 2.5cm
Learn more about circle: brainly.com/question/24375372
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