The gross domestic product (GDP) of a certain country, which measures the overall size of the economy in billions o dollars, can be approximated by the function g(x)=560x+8810, where x = 10 corresponds to the year 2010. Estimat- the GDP (to the nearest billion dollars) in the given years. (a) 2004 (b) 2010 (c) 2015 (a) What value of x corresponds to the year 2004? x= (Type a whole number.)