Solve the Problem $- 0.3 \mathrm { t } ^ { 2 } + 10 \mathrm { t }$

Multiple Choice

Solve the problem.
-The polynomial $- 0.3 \mathrm { t } ^ { 2 } + 10 \mathrm { t }$ describes the average number of digits that participants in a memorization experiment were able to recall after t minutes. Find the number of digits recalled after 9 minutes. Round to the
Nearest digit.

A) 46 digits
B) 66 digits
C) 86 digits
D) 106 digits