Question

find the circumference and area of the adjacent circle. use the $pi$ key for $pi$. the circumference of the circle is approximately (type an integer or decimal rounded to the nearest tenth as needed)

Explanation:

Step1: Identify radius

The diameter $d = 7.1$ m, and the radius $r=\frac{d}{2}=\frac{7.1}{2}=3.55$ m.

Step2: Calculate circumference

The formula for the circumference of a circle is $C = 2\pi r$. Substitute $r = 3.55$ m into the formula: $C=2\pi\times3.55 = 7.1\pi$ m. Using $\pi\approx3.14159$, $C\approx7.1\times3.14159\approx22.3$ m.

Step3: Calculate area

The formula for the area of a circle is $A=\pi r^{2}$. Substitute $r = 3.55$ m into the formula: $A=\pi\times(3.55)^{2}=\pi\times12.6025$ m². Using $\pi\approx3.14159$, $A\approx3.14159\times12.6025\approx39.6$ m².

Answer:

The circumference of the circle is approximately $22.3$ m.
The area of the circle is approximately $39.6$ m².