Question
What is the circumference of a circle with a radius of 2.5 feet?
Estimate the circumference to the tenths place using 3.14 for .
(1 point)
π
7.85 feet
15.6 feet
16 feet
15.7 feet
Estimate the circumference to the tenths place using 3.14 for .
(1 point)
π
7.85 feet
15.6 feet
16 feet
15.7 feet
Answers
GPT-4o mini
To find the circumference \( C \) of a circle, we can use the formula:
\[
C = 2\pi r
\]
where \( r \) is the radius of the circle and \( \pi \) is approximately 3.14. Given that the radius \( r \) is 2.5 feet, we can substitute this value into the formula:
\[
C = 2 \times 3.14 \times 2.5
\]
Calculating this step by step:
1. First, calculate \( 2 \times 2.5 = 5 \).
2. Now, multiply by \( 3.14 \):
\[
C = 5 \times 3.14 = 15.7
\]
Therefore, the circumference of the circle is approximately **15.7 feet**.
So the correct answer is **15.7 feet**.
\[
C = 2\pi r
\]
where \( r \) is the radius of the circle and \( \pi \) is approximately 3.14. Given that the radius \( r \) is 2.5 feet, we can substitute this value into the formula:
\[
C = 2 \times 3.14 \times 2.5
\]
Calculating this step by step:
1. First, calculate \( 2 \times 2.5 = 5 \).
2. Now, multiply by \( 3.14 \):
\[
C = 5 \times 3.14 = 15.7
\]
Therefore, the circumference of the circle is approximately **15.7 feet**.
So the correct answer is **15.7 feet**.