Question

the radius of a circle is 2.2 in. find the circumference to the nearest tenth.

Explanation:

Step1: Recall the formula for the circumference of a circle

The formula for the circumference of a circle is \(C = 2\pi r\), where \(r\) is the radius of the circle.

Step2: Substitute the given radius into the formula

Given \(r = 2.2\) in, we substitute into the formula: \(C=2\pi\times2.2\).

Step3: Calculate the value

\(C = 4.4\pi\). Using \(\pi\approx3.14\), we have \(C\approx4.4\times3.14 = 13.816\).

Step4: Round to the nearest tenth

Rounding \(13.816\) to the nearest tenth, we look at the hundredth - digit. The hundredth - digit is \(1\), so we keep the tenth - digit as it is.

Answer:

\(13.8\) in