A circle has a radius r which is a positive integer. If the circumference of the circle divided by the area of the circle is a p
1 answer:
The possible value for the radius of the circle is 1 unit
<h3 /><h3>Area and Circumference of a circle </h3>The formula for calculating the area of a circle is expressed as:
- A = πr²
The formula for calculating the circumference is expressed as:
- C = 2πr
where r is the radius of the given circle.
If the circumference of the circle divided by the area of the circle is a prime number, then;
For the value to the prime and r to be an integer, the possible value for the radius of the circle is 1 unit
Learn more on circles here: brainly.com/question/402655
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Answer: C)46 ft
Step-by-step explanation:
We know that the circumference of a circle can be calculated with this formula:
Where "r" is the radius of the circle.
Since John is putting a fence around his garden that is shaped like a half circle and a rectangle, then we can find how much fencing he needs by making this addition:
Where "l" is the lenght of the rectangle and "w" is the width of the rectangle.
Since we know that the radius of the circle is half its diameter, we can find "r". This is:
Then, substituting values (and using ), we get: