active2013 active2013
  • 07-08-2017
  • Mathematics
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In 2011, there were 984 rotary rigs drilling for crude oil in the United States. This was 687 more rigs than were active in 2007. Find the number of active rotary oil rigs in 2007.

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theirishwizardouavix theirishwizardouavix
  • 07-08-2017
297 rotary rigs were active in 2007
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