Last part: increasing or decreasing ; rise or fall ; positivityor negativity ; increase or decrease GDP of a Developing Country A developing country's gross domestic product (GDP) from 2006 to 2015 is approximated by the function \[ G(t)=-0.2 t^{3}+2.4 t^{2}+70 \quad(0 \leq t \leq 9) \] where \( G(t 2 answers