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**Professor Peabody was having fun exploring different numbers for the circumference and the diameter of circles on his calculator. Use the key on your calculator to solve the problems.**

- Find the circumference of a circle that has a diameter of 3367 inches. Round your answer to the nearest inch.
- Find the diameter of a circle that has a circumference of 82,771 inches. Round your answer to the nearest inch.

**First estimate in your head. Then use your calculator to find a better estimate of the diameter for the circles with circumferences listed in Questions 3 and 4. Round your answer to the nearest tenth of a unit.**

*C*= 942 units*C*= 8075 units

**First estimate in your head. Then use your calculator to find a better estimate of the circumference for the diameters listed in Questions 5 and 6. Round your answer to the nearest tenth of a unit.**

*D*= 9460 units*D*= 5977.6 units- A trundle wheel is a disk that rolls along the ground and clicks once every time it makes a complete turn. It is often used for surveying land. What is the diameter of a trundle wheel that clicks once every meter? Round your answer to the nearest hundredth of a meter.