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Test: Chapter 3 Test Question 1 of 23 This question: 1 point(s) possible Submit test The number of country A forces in country B decreased to approximately 34,000 in 2014 from a high of about 100,000 in 2008. The amount of country A funding for country B security forces also decreased during this period. The function f(x)=-1.389x+5.262x+5,517 can be used to estimate the amount of country A funding for country B security forces, in bilions of dollars, x years after January 2007. In what year was the amount of country A funding for country B security forces about $10.5 billion? Gure The amount of country A funding for country B security forces was about $10.5 billion in the year. (Round down to the nearest year)