8. In Gerfm many, people or drive 130 kilometers per hour on the Autobahn (highway). How fast are they going in miles per hour? Make an estimate first, explaining your reasoning briefly. Then calcu- late your answer using the fact that 1 in. = 2.54 cm. 9. One foot is 12 inches. Does this mean that 1 square foot is 12 square inches? Draw a picture show- ing how many square inches are in a square foot. Use the meaning of multiplication to explain LKCL2 why you can calculate the area of 1 square foot in terms of square inches by multiplying. 30 10. A room has a floor area of 48 square yards. What ompa is the area of the room in square feet? Solve this problem in two different ways, each time refer- Fa ring to the meaning of multiplication. da's 11. One kilometer is 1000 meters. Does this mean that nd 1 square kilometer is 1000 square meters? If not, what is 1 square kilometer in terms of square meters? Explain your answer in detail, referring to the ume ar di meaning of multiplication. 12. One foot is 12 inches. Does this mean that 1 cubic foot is 12 cubic inches? Describe how to use the ol meaning of multiplication to determine what 1 cubic foot is in terms of cubic inches. 13. How much mulch will you need to cover a rec- tangular garden that is 20 feet by 30 feet with a

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