1. A circle has radius of 3cm. How does the circumference of the circle compare to the area?
2. A circular piece of metal has a radius of 3.5 meters. The metal sells for $3.25 per m².
What is the total cost of the circular piece of metal?
Use 3.14 for pi
3. A 12-inch diameter pizza has 22 calories per square inch.
About how many calories are in the entire pizza?
Use 3.14 for pi
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