The gross annual earnings of a certain company were A(t) =

Last updated: 7/17/2022

The gross annual earnings of a certain company were A(t) = 0.3t² + 12t + 21 thousand dollars t years after its formation in 2008. At what percentage rate were the gross annual earnings growing with respect to time in 2012? 18.74% per year 20.44% per year 19.51% per year 17.89% per year