Aparticular company's net sales, in billions, from 2008 to 2018 can be modeled by the expression t2 + 10t + 68, where t is the number of years since the end of 2008. what does the constant term of the expression represent in terms of the context? the company earned 68 billion dollars from 2008 to 2018. the company earned 68 billion dollars in 2008. the company earned 10 billion dollars from 2008 to 2018. the company earned 10 billion dollars in 2008.