Question

1. radius = 2.6 in
2. radius = 34.1 in
3. radius = 13.2 km
4. radius = 29.9 km

find the circumference of each circle. use your calculators value of π. round your answer to the nearest tenth.
9)
10)

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: Calculate the circumference for problem 9

Given \(r = 8\) mi.
Substitute \(r = 8\) into the formula:
\(C=2\pi r=2\times\pi\times8 = 16\pi\approx16\times3.14159 = 50.26544\approx50.3\) mi

Step3: Calculate the circumference for problem 10

Given \(r = 8.3\) yd.
Substitute \(r = 8.3\) into the formula:
\(C = 2\pi r=2\times\pi\times8.3=16.6\pi\approx16.6\times3.14159 = 52.150394\approx52.2\) yd

Answer:

1. \(50.3\) mi
2. \(52.2\) yd