Answer
The completed table is as shown.
The $\$13$ trillion total public debt is reached in year $2010$.
Work Step by Step
$$D=-0.071t^2+2.94t-10.0$$
Substituting $t=8$:
$$D=-0.071(8)^2+2.94(8)-10.0=8.98$$
Similarly, the completed table is as shown.
Notice that the $D$-value is between $t=10$ and $t=11$. Thus, the $\$13$ trillion total public debt is reached in $t=10$ which equivalent year is:
$$Year=2000+10=2010$$
