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

question 67

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

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