Find the perimeter of the shape below. Show your work!! Use 3.14 as an approximation for pi. Round solution to nearest hundreth.

The diameter of a circle is 12 inches. Find the circumference of the circle in terms of pi.
The radius of a circle is 22 centimeters. Find the circumference of the circle using 3.14 as an approximation for pi.
The circumference of a circle is 300 meters. Find the radius. Use 3.14 as an approximation for pi. Round your answer to the nearest tenth.