According to the 2000 U.S. Census, 7 out of every 25 homes are heated by electricity. At this rate, predict how many homes in a community of 12,000 would be heated by electricity.

Use the proportion 7 out of 25: multiply the community size by 7/25. Since 12,000 ÷ 25 = 480, then 480 × 7 = 3,360 homes. The correct choice is 3,360 homes.

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