Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
![**Problem Statement:**
10. Find the radius of a circle with a circumference of 21.99 feet.
**Explanation:**
To solve this problem, we need to remember the formula for the circumference of a circle, which is given by:
\[ C = 2 \pi r \]
Where:
- \( C \) is the circumference.
- \( \pi \) (Pi) is a constant approximately equal to 3.14159.
- \( r \) is the radius of the circle.
Given:
- The circumference \( C \) is 21.99 feet.
To find the radius \( r \), we can rearrange the formula to solve for \( r \):
\[ r = \frac{C}{2 \pi} \]
Now, substitute the given circumference into the formula:
\[ r = \frac{21.99}{2 \pi} \]
Perform the calculation (using \( \pi \approx 3.14159 \)):
\[ r = \frac{21.99}{2 \times 3.14159} \]
\[ r = \frac{21.99}{6.28318} \]
\[ r \approx 3.50 \]
So, the radius of the circle is approximately 3.5 feet.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F090f77ee-7dfd-4778-8123-bd0c25401a07%2Ff38373e2-5f81-4973-b97b-be7ee120a3c9%2F7locqqf_processed.jpeg&w=3840&q=75)
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