问题描述：
英语翻译
twelve cows produce 224,988 pounds of milk
find the unit rate in pounds per cow.
a model airplane flies 18 feet in 2 seconds.
what is the airplane's speed in miles per hour?
round your answer to the nearest hundredth.
twelve cows produce 224,988 pounds of milk
find the unit rate in pounds per cow.
a model airplane flies 18 feet in 2 seconds.
what is the airplane's speed in miles per hour?
round your answer to the nearest hundredth.
问题解答：
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