2001 Pascal Problem 6

Anna's term mark was 80\%. Her exam mark was 90\%. In calculating her final mark, the term mark was given a weight of 70\% and the exam mark a weight of 30\%. What was her final mark?

\textbf{(A)}\ 81\%\quad \textbf{(B)}\ 83\%\quad \textbf{(C)}\ 84\%\quad \textbf{(D)}\ 85\%\quad \textbf{(E)}\ 87\%

If there are no answer choices shown, enter a numerical answer.

Full credit to this problem is given to the CEMC, you may view all Pascal contests here.