What is the circumference of a circle with a radius of 2.5 feet?

Question

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

Answer 1

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.