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.