Question

The radius of a circle is 11 kilometers. What is the circle's area?
r=11 km
Use ​𝜋 ≈ 3.14 and round your answer to the nearest hundredth.
square kilometers

Answer 1

To calculate the area of a circle, you can use the formula:

\[
\text{Area} = \pi r^2
\]

where \( r \) is the radius of the circle.

Given:
- \( r = 11 \) km
- \( \pi \approx 3.14 \)

Now substitute the value of \( r \) into the formula:

\[
\text{Area} = 3.14 \times (11)^2
\]

Calculate \( (11)^2 \):

\[
(11)^2 = 121
\]

Now multiply by \( \pi \):

\[
\text{Area} = 3.14 \times 121
\]

Perform the multiplication:

\[
3.14 \times 121 = 380.94
\]

Thus, the area of the circle is approximately:

\[
\text{Area} \approx 380.94 \text{ square kilometers}
\]

Rounding to the nearest hundredth, the final answer is:

\[
\text{Area} \approx 380.94 \text{ square kilometers}
\]