the number of country A forces country B decreased to approximately 34,000 in 2014 from a high of about 10,000 in 2008. the amount of country A funding for country B security forces also decreased during this period. the function [tex]f(x)= -1.384x^{2} +5.253x+5.517[tex] can be used to estimate the amount for country A funding for country B security forces. in billions of dollars, x years after January 2007. in what year was the amount for country A funding for country B security forces about $10.5 billion?