1. To the nearest square foot, what is the area of a circular rose garden that measures 28 feet through the center?
2. A sprinkler waters in a circular pattern, spraying water out a distance of 3.1 meters. How much lawn surface does the sprinkler water?
3. If 6 people share a large pizza that has a 14 inch diameter, how much pizza will each person get? Give an answer to the nearest square inch.
4. The circular flat roof of a water tower has a diameter of 28 feet. What is the area of this roof?
5. Radio station KNPA broadcasts its signal to all points within an 84 km radius of the station. What is the area of the region served by this station?