A circular drum has a radius of 12.25 inches. Karen wants to glue a ribbon around the edge of the drum. If Karen has exactly enough ribbon, which measurement is closest to the length of the piece of ribbon in inches?
To find the length of the ribbon, we need to find the circumference of the circular drum. The formula for the circumference of a circle is C = 2πr, where C is the circumference and r is the radius.
Given that the radius of the drum is 12.25 inches, we can calculate the circumference using the formula:
C = 2π(12.25) ≈ 77.0 inches
Therefore, the length of the piece of ribbon needed is approximately 77.0 inches.